Optical imaging system

ABSTRACT

An optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens sequentially disposed in numerical order along an optical axis of the optical imaging system from an object side of the optical imaging system toward an imaging plane of the optical imaging system, wherein the first to seventh lenses are spaced apart from each other along the optical axis, and the optical imaging system satisfies 0.4&lt;L1TR/L7TR&lt;1.9, where L1TR is an overall outer diameter of the first lens, L7TR is an overall outer diameter of the seventh lens, and L1TR and L7TR are expressed in a same unit of measurement.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of application Ser. No. 16/423,218filed on May 28, 2019, and claims the benefit under 35 USC 119(a) ofKorean Patent Application Nos. 10-2018-0061410 filed on May 29, 2018,and 10-2018-0106171 filed on Sep. 5, 2018, in the Korean IntellectualProperty Office, the entire disclosures of which are incorporated hereinby reference for all purposes.

BACKGROUND 1. Field

This application relates to an optical imaging system.

2. Description of Related Art

Recently, mobile communications terminals have been provided with cameramodules, enabling video calling and image capturing. In addition, asutilization of the camera modules mounted in the mobile communicationsterminals has increased, camera modules for the mobile communicationsterminals have gradually been required to have high resolution andperformance.

Therefore, the number of lenses included in the camera module hasincreased. However, since the mobile communications terminal in whichthe camera module is mounted tends to be miniaturized, it is verydifficult to arrange the lenses in the camera module.

Therefore, research into technology capable of performing aberrationcorrection to achieve high resolution and arranging a plurality oflenses in a limited space has been ongoing.

SUMMARY

This Summary is provided to introduce a selection of concepts in asimplified form that are further described below in the DetailedDescription. This Summary is not intended to identify key features oressential features of the claimed subject matter, nor is it intended tobe used as an aid in determining the scope of the claimed subjectmatter.

In one general aspect, an optical imaging system includes a first lens,a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens,and a seventh lens sequentially disposed in numerical order along anoptical axis of the optical imaging system from an object side of theoptical imaging system toward an imaging plane of the optical imagingsystem, wherein the first to seventh lenses are spaced apart from eachother along the optical axis, and the optical imaging system satisfies0.4<L1TR/L7TR<1.9, where L1TR is an overall outer diameter of the firstlens, L7TR is an overall outer diameter of the seventh lens, and L1TRand L7TR are expressed in a same unit of measurement.

The optical imaging system may further satisfy 0.4<L1TR/L7TR<0.7.

The optical imaging system may further satisfy 0.1<L1w/L7w<0.3, whereL1w is a weight of the first lens, L7w is a weight of the seventh lens,and L1w and L7w are expressed in a same unit of measurement.

The optical imaging system may further include a spacer disposed betweenthe sixth and seventh lenses, and the optical imaging system may furthersatisfy 0.5<S6d/f<1.2, where S6d is an inner diameter of the spacer, fis an overall focal length of the optical imaging system, and S6d and fare expressed in a same unit of measurement.

The optical imaging system may further satisfy 0.5<L1234TRavg/L7TR<0.75,where L1234TRavg is an average value of overall outer diameters of thefirst to fourth lenses, L7TR is an overall diameter of the seventh lens,and L1234TRavg and L7TR are expressed in a same unit of measurement.

The optical imaging system may further satisfy0.5<L12345TRavg/L7TR<0.76, where L12345TRavg is an average value ofoverall outer diameters of the first to fifth lenses, L7TR is an overalldiameter of the seventh lens, and L12345TRavg and L7TR are expressed ina same unit of measurement.

The optical imaging system may further satisfy0.1<(1/f1+1/f2+1/f3+1/f4+1/f5+1/f6+1/f7)*f<0.8, where f1 is a focallength of the first lens, f2 is a focal length of the second lens, f3 isa focal length of the third lens, f4 is a focal length of the fourthlens, f5 is a focal length of the fifth lens, f6 is a focal length ofthe sixth lens, f7 is a focal length of the seventh lens, f is anoverall focal length of the optical imaging system, and f1, f2, f3, f4,f5, f6, f7, and f are expressed in a same unit of measurement.

The optical imaging system may further satisfy0.1<(1/f1+1/f2+1/f3+1/f4+1/f5+1/f6+1/f7)*TTL<1.0, where f1 is a focallength of the first lens, f2 is a focal length of the second lens, f3 isa focal length of the third lens, f4 is a focal length of the fourthlens, f5 is a focal length of the fifth lens, f6 is a focal length ofthe sixth lens, f7 is a focal length of the seventh lens, TTL is adistance along the optical axis from an object-side surface of the firstlens to the imaging plane, and f1, f2, f3, f4, f5, f6, f7, and TTL areexpressed in a same unit of measurement.

The optical imaging system may further satisfy 0.2<TD1/D67<0.8, whereTD1 is a thickness along the optical axis of the first lens, D67 is adistance along the optical axis from an object-side surface of the sixthlens to an image-side surface of the seventh lens, and TD1 and D67 areexpressed in a same unit of measurement.

The imaging plane may be an imaging plane of an image sensor, and theoptical imaging system may further satisfy TTL 6.00 mm and0.6<TTL/(2*IMG HT)<0.9, where TTL is a distance along the optical axisfrom an object-side surface of the first lens to the imaging plane ofthe image sensor, IMG HT is one-half of a diagonal length of the imagingplane of the image sensor, and TTL and IMG HT are expressed in mm.

The optical imaging system may further satisfy 0.2<ΣSD/ΣTD<0.7, whereΣSD is a sum of air gaps along the optical axis between the first toseventh lenses, ΣTD is a sum of thicknesses along the optical axis ofthe first to seventh lenses, and ΣSD and ΣTD are expressed in a sameunit of measurement.

The optical imaging system may further satisfy0<min(f1:f3)/max(f4:f7)<0.4, where min(f1:f3) is a minimum value ofabsolute values of focal lengths of the first to third lenses,max(f4:f7) is a maximum value of absolute values of focal lengths of thefourth to seventh lenses, and min(f1:f3) and max(f4:f7) are expressed ina same unit of measurement.

The optical imaging system may further satisfy 0.4<ΣTD/TTL<0.7, whereΣTD is a sum of thicknesses along the optical axis of the first toseventh lenses, TTL is a distance along the optical axis from anobject-side surface of the first lens to the imaging plane, and ΣTD andTTL are expressed in a same unit of measurement.

The optical imaging system may further satisfy 0.81<f12/f123<0.96, wheref12 is a composite focal length of the first and second lenses, f123 isa composite focal length of the first to third lenses, and f12 and f123are expressed in a same unit of measurement.

The optical imaging system may further satisfy 0.6<f12/f1234<0.84, wheref12 is a composite focal length of the first and second lenses, f1234 isa composite focal length of the first to fourth lenses, and f12 andf1234 are expressed in a same unit of measurement.

The second lens may have a positive refractive power, and the third lensmay have a negative refractive power.

The fifth lens may have a negative refractive power, and a paraxialregion of an object-side surface of the fifth lens may be concave orconvex.

The fifth lens may have a negative refractive power, and a paraxialregion of an image-side surface of the fifth lens may be concave orconvex.

A paraxial region of an object-side surface of the sixth lens may beconcave or convex.

A paraxial region of an object-side surface of the seventh lens may beconcave.

Other features and aspects will be apparent from the following detaileddescription, the drawings, and the claims.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a view illustrating a first example of an optical imagingsystem.

FIG. 2 illustrates aberration curves of the optical imaging system ofFIG. 1 .

FIG. 3 is a view illustrating a second example of an optical imagingsystem.

FIG. 4 illustrates aberration curves of the optical imaging system ofFIG. 3 .

FIG. 5 is a view illustrating a third example of an optical imagingsystem.

FIG. 6 illustrates aberration curves of the optical imaging system ofFIG. 5 .

FIG. 7 is a view illustrating a fourth example of an optical imagingsystem.

FIG. 8 illustrates aberration curves of the optical imaging system ofFIG. 7 .

FIG. 9 is a view illustrating a fifth example of an optical imagingsystem.

FIG. 10 illustrates aberration curves of the optical imaging system ofFIG. 9 .

FIG. 11 is a view illustrating a sixth example of an optical imagingsystem.

FIG. 12 illustrates aberration curves of the optical imaging system ofFIG. 11 .

FIG. 13 is a view illustrating a seventh example of an optical imagingsystem.

FIG. 14 illustrates aberration curves of the optical imaging system ofFIG. 13 .

FIG. 15 is a view illustrating an eighth example of an optical imagingsystem.

FIG. 16 illustrates aberration curves of the optical imaging system ofFIG. 15 .

FIG. 17 is a view illustrating a ninth example of an optical imagingsystem.

FIG. 18 illustrates aberration curves of the optical imaging system ofFIG. 17 .

FIG. 19 is a view illustrating a tenth example of an optical imagingsystem.

FIG. 20 illustrates aberration curves of the optical imaging system ofFIG. 19 .

FIG. 21 is a view illustrating an eleventh example of an optical imagingsystem.

FIG. 22 illustrates aberration curves of the optical imaging system ofFIG. 21 .

FIG. 23 is a view illustrating a twelfth example of an optical imagingsystem.

FIG. 24 illustrates aberration curves of the optical imaging system ofFIG. 23 .

FIG. 25 is a view illustrating a thirteenth example of an opticalimaging system.

FIG. 26 illustrates aberration curves of the optical imaging system ofFIG. 25 .

FIG. 27 is a view illustrating a fourteenth example of an opticalimaging system.

FIG. 28 illustrates aberration curves of the optical imaging system ofFIG. 27 .

FIG. 29 is a view illustrating a fifteenth example of an optical imagingsystem.

FIG. 30 illustrates aberration curves of the optical imaging system ofFIG. 29 .

FIG. 31 is a view illustrating a sixteenth example of an optical imagingsystem.

FIG. 32 illustrates aberration curves of the optical imaging system ofFIG. 31 .

FIG. 33 is a view illustrating a seventeenth example of an opticalimaging system.

FIG. 34 illustrates aberration curves of the optical imaging system ofFIG. 33 .

FIG. 35 is a view illustrating an eighteenth example of an opticalimaging system.

FIG. 36 illustrates aberration curves of the optical imaging system ofFIG. 35 .

FIG. 37 is a view illustrating a nineteenth example of an opticalimaging system.

FIG. 38 illustrates aberration curves of the optical imaging system ofFIG. 37 .

FIG. 39 is a view illustrating a twentieth example of an optical imagingsystem.

FIG. 40 illustrates aberration curves of the optical imaging system ofFIG. 39 .

FIG. 41 is a view illustrating a twenty-first example of an opticalimaging system.

FIG. 42 illustrates aberration curves of the optical imaging system ofFIG. 41 .

FIG. 43 is a view illustrating a twenty-second example of an opticalimaging system.

FIG. 44 illustrates aberration curves of the optical imaging system ofFIG. 43 .

FIG. 45 is a view illustrating a twenty-third example of an opticalimaging system.

FIG. 46 illustrates aberration curves of the optical imaging system ofFIG. 45 .

FIG. 47 is a view illustrating a twenty-fourth example of an opticalimaging system.

FIG. 48 illustrates aberration curves of the optical imaging system ofFIG. 47 .

FIG. 49 is a view illustrating a twenty-fifth example of an opticalimaging system.

FIG. 50 illustrates aberration curves of the optical imaging system ofFIG. 49 .

FIG. 51 is a view illustrating a twenty-sixth example of an opticalimaging system.

FIG. 52 illustrates aberration curves of the optical imaging system ofFIG. 51 .

FIG. 53 is a view illustrating a twenty-seventh example of an opticalimaging system.

FIG. 54 illustrates aberration curves of the optical imaging system ofFIG. 53 .

FIG. 55 is a view illustrating a twenty-eighth example of an opticalimaging system.

FIG. 56 illustrates aberration curves of the optical imaging system ofFIG. 55 .

FIGS. 57 and 58 are cross-sectional views illustrating examples of anoptical imaging system and a lens barrel coupled to each other.

FIG. 59 is a cross-sectional view illustrating an example of a shape ofa rib of a seventh lens.

FIG. 60 is a cross-sectional view illustrating an example of a seventhlens.

Throughout the drawings and the detailed description, the same referencenumerals refer to the same elements. The drawings may not be to scale,and the relative size, proportions, and depiction of elements in thedrawings may be exaggerated for clarity, illustration, and convenience.

DETAILED DESCRIPTION

The following detailed description is provided to assist the reader ingaining a comprehensive understanding of the methods, apparatuses,and/or systems described herein. However, various changes,modifications, and equivalents of the methods, apparatuses, and/orsystems described herein will be apparent after an understanding of thedisclosure of this application. For example, the sequences of operationsdescribed herein are merely examples, and are not limited to those setforth herein, but may be changed as will be apparent after anunderstanding of the disclosure of this application, with the exceptionof operations necessarily occurring in a certain order. Also,descriptions of features that are known in the art may be omitted forincreased clarity and conciseness.

The features described herein may be embodied in different forms, andare not to be construed as being limited to the examples describedherein. Rather, the examples described herein have been provided merelyto illustrate some of the many possible ways of implementing themethods, apparatuses, and/or systems described herein that will beapparent after an understanding of the disclosure of this application.

Throughout the specification, when an element, such as a layer, region,or substrate, is described as being “on,” “connected to,” or “coupledto” another element, it may be directly “on,” “connected to,” or“coupled to” the other element, or there may be one or more otherelements intervening therebetween. In contrast, when an element isdescribed as being “directly on,” “directly connected to,” or “directlycoupled to” another element, there can be no other elements interveningtherebetween.

As used herein, the term “and/or” includes any one and any combinationof any two or more of the associated listed items.

Although terms such as “first,” “second,” and “third” may be used hereinto describe various members, components, regions, layers, or sections,these members, components, regions, layers, or sections are not to belimited by these terms. Rather, these terms are only used to distinguishone member, component, region, layer, or section from another member,component, region, layer, or section. Thus, a first member, component,region, layer, or section referred to in examples described herein mayalso be referred to as a second member, component, region, layer, orsection without departing from the teachings of the examples.

Spatially relative terms such as “above,” “upper,” “below,” and “lower”may be used herein for ease of description to describe one element'srelationship to another element as shown in the figures. Such spatiallyrelative terms are intended to encompass different orientations of thedevice in use or operation in addition to the orientation depicted inthe figures. For example, if the device in the figures is turned over,an element described as being “above” or “upper” relative to anotherelement will then be “below” or “lower” relative to the other element.Thus, the term “above” encompasses both the above and below orientationsdepending on the spatial orientation of the device. The device may alsobe oriented in other ways (for example, rotated by 90 degrees or atother orientations), and the spatially relative terms used herein are tobe interpreted accordingly.

The terminology used herein is for describing various examples only, andis not to be used to limit the disclosure. The articles “a,” “an,” and“the” are intended to include the plural forms as well, unless thecontext clearly indicates otherwise. The terms “comprises,” “includes,”and “has” specify the presence of stated features, numbers, operations,members, elements, and/or combinations thereof, but do not preclude thepresence or addition of one or more other features, numbers, operations,members, elements, and/or combinations thereof.

Thicknesses, sizes, and shapes of lenses illustrated in the drawings mayhave been slightly exaggerated for convenience of explanation. Inaddition, the shapes of spherical surfaces or aspherical surfaces of thelenses described in the detailed description and illustrated in thedrawings are merely examples. That is, the shapes of the sphericalsurfaces or the aspherical surfaces of the lenses are not limited to theexamples described herein.

Numerical values of radii of curvature, thicknesses of lenses, distancesbetween elements including lenses or surfaces, effective aperture radiiof lenses, focal lengths, and diameters, thicknesses, and lengths ofvarious elements are expressed in millimeters (mm), and angles areexpressed in degrees. Thicknesses of lenses and distances betweenelements including lenses or surfaces are measured along the opticalaxis of the optical imaging system.

The term “effective aperture radius” as used in this application refersto a radius of a portion of a surface of a lens or other element (anobject-side surface or an image-side surface of a lens or other element)through which light actually passes. The effective aperture radius isequal to a distance measured perpendicular to an optical axis of thesurface between the optical axis of the surface and the outermost pointon the surface through which light actually passes. Therefore, theeffective aperture radius may be equal to a radius of an optical portionof a surface, or may be smaller than the radius of the optical portionof the surface if light does not pass through a peripheral portion ofthe optical portion of the surface. The object-side surface and theimage-side surface of a lens or other element may have differenteffective aperture radii.

In this application, unless stated otherwise, a reference to the shapeof a lens surface means the shape of a paraxial region of the lenssurface. A paraxial region of a lens surface is a central portion of thelens surface surrounding the optical axis of the lens surface in whichlight rays incident to the lens surface make a small angle θ to theoptical axis and the approximations sin θ≈θ, tan θ≈θ, and cos θ≈θ arevalid.

For example, a statement that the object-side surface of a lens isconvex means that at least a paraxial region of the object-side surfaceof the lens is convex, and a statement that the image-side surface ofthe lens is concave means that at least a paraxial region of theimage-side surface of the lens is concave. Therefore, even though theobject side-surface of the lens may be described as being convex, theentire object-side surface of the lens may not be convex, and aperipheral region of the object-side surface of the lens may be concave.Also, even though the image-side surface of the lens may be described asbeing concave, the entire image-side surface of the lens may not beconcave, and a peripheral region of the image-side surface of the lensmay be convex.

FIGS. 57 and 58 are cross-sectional views illustrating examples of anoptical imaging system and a lens barrel coupled to each other.

Referring to FIGS. 57 and 58 , an optical imaging system 100 includes aplurality of lenses disposed along an optical axis. In addition, theoptical imaging system 100 further includes a lens barrel 200accommodating the plurality of lenses therein. The plurality of lensesare spaced apart from each other by predetermined distances along theoptical axis.

Each lens of the optical imaging system 100 includes an optical portionand a rib. The optical portion of the lens is a portion of the lens thatis configured to refract light, and is generally formed in a centralportion of the lens. The rib of the lens is an edge portion of the lensthat enables the lens to be mounted in the lens barrel 200 and theoptical axis of the lens to be aligned with the optical axis of theoptical imaging system 100. The rib of the lens extends radially outwardfrom the optical portion, and may be formed integrally with the opticalportion. The optical portions of the lenses are generally not in contactwith each other. For example, the first to seventh lenses are mounted inthe lens barrel 200 so that they are spaced apart from one another bypredetermined distances along the optical axis of the optical imagingsystem 100. The ribs of the lenses may be in selective contact with eachother. For example, the ribs of the first to fourth lenses, or the firstto fifth lenses, or the second to fourth lenses, may be in contact witheach other so that the optical axes of these lenses may be easilyaligned with the optical axis of the optical imaging system 100.

The examples of the optical imaging system 100 described in thisapplication may include a self-alignment structure as illustrated inFIGS. 57 and 58 .

In one example illustrated in FIG. 57 , the optical imaging system 100includes a self-alignment structure in which optical axes of fourconsecutive lenses 1000, 2000, 3000, and 4000 are aligned with anoptical axis of the optical imaging system 100 by coupling the fourlenses 1000, 2000, 3000, and 4000 to one another.

The first lens 1000 disposed closest to an object side of the opticalimaging system 100 is disposed in contact with an inner surface of thelens barrel 200 to align the optical axis of the first lens 1000 withthe optical axis of the optical imaging system 100, the second lens 2000is coupled to the first lens 1000 to align the optical axis of thesecond lens 2000 with the optical axis of the optical imaging system100, the third lens 3000 is coupled to the second lens 2000 to align theoptical axis of the third lens 3000 with the optical axis of the opticalimaging system 100, and the fourth lens 4000 is coupled to the thirdlens 3000 to align the optical axis of the fourth lens 4000 with theoptical axis of the optical imaging system 100. The second lens 2000 tothe fourth lens 4000 may not be disposed in contact with the innersurface of the lens barrel 200.

Although FIG. 57 illustrates that the first lens 1000 to the fourth lens4000 are coupled to one another, the four consecutive lenses that arecoupled to one another may be changed to the second lens 2000 to a fifthlens 5000, the third lens 3000 to a sixth lens 6000, or the fourth lens4000 to a seventh lens 7000.

In another example illustrated in FIG. 58 , the optical imaging system100 includes a self-alignment structure in which optical axes of fiveconsecutive lenses 1000, 2000, 3000, 4000, and 5000 are aligned with anoptical axis of the optical imaging system 100 by coupling the fivelenses 1000, 2000, 3000, 4000, and 5000 to one another.

The first lens 1000 disposed closest to an object side of the opticalimaging system 100 is disposed in contact with an inner surface of thelens barrel 200 to align an optical axis of the first lens 1000 with theoptical axis of the optical imaging system 100, the second lens 2000 iscoupled to the first lens 1000 to align the optical axis of the secondlens 2000 with the optical axis of the optical imaging system 100, thethird lens 3000 is coupled to the second lens 2000 to align the opticalaxis of the third lens 3000 with the optical axis of the optical imagingsystem 100, the fourth lens 4000 is coupled to the third lens 3000 toalign the optical axis of the fourth lens 4000 with the optical axis ofthe optical imaging system 100, and the fifth lens 5000 is coupled tothe fourth lens 4000 to align the optical axis of the fifth lens 5000with the optical axis of the optical imaging system 100. The second lens2000 to the fifth lens 5000 may not be disposed in contact with theinner surface of the lens barrel 200.

Although FIG. 58 illustrates that the first lens 1000 to the fifth lens5000 are coupled to one another, the five consecutive lenses that arecoupled to one another may be changed to the second lens 2000 to a sixthlens 6000, or the third lens 3000 to a seventh lens 7000.

The first lens 1000 is a lens closest to an object (or a subject) to beimaged by the optical imaging system 100, while the seventh lens 7000 isa lens closest to an image sensor (not shown in FIGS. 57 and 58 , butsee the image sensor 190 in FIG. 1 , for example).

In addition, an object-side surface of a lens is a surface of the lensfacing the object, and an image-side surface of a lens is a surface ofthe lens facing the image sensor.

The examples of the optical imaging system 100 disclosed in thisapplication include seven lenses.

For example, referring to FIGS. 57 and 58 , the optical imaging system100 includes a first lens 1000, a second lens 2000, a third lens 3000, afourth lens 4000, a fifth lens 5000, a sixth lens 6000, and a seventhlens 7000 sequentially disposed in numerical order along an optical axisof the optical imaging system 100 from an object side of the opticalimaging system 100 toward an imaging plane of the optical imaging system100.

The optical imaging system 100 further includes an image sensor and afilter. The image sensor forms an imaging plane, and converts lightrefracted by the first to seventh lenses into an electric signal. Thefilter is disposed between the seventh lens and the imaging plane, andblocks infrared rays in the light refracted by the first to seventhlenses from being incident on the imaging plane.

In addition, the optical imaging system 100 further includes a stop toadjust an amount of light incident on the imaging plane. For example,the stop may be disposed in front of the first lens 1000, or between thefirst lens 1000 and the second lens 2000, or between the second lens2000 and the third lens 3000, or at the position of either anobject-side surface or an image-side surface of one of the first lens1000 to the third lens 3000. The stop may be disposed relatively closeto the first lens 1000 to reduce a total length (TTL) of the opticalimaging system 100. Some examples may include two stops, one of whichmay be disposed in front of the first lens 1000, or at the position ofthe object-side surface of the first lens 1000, or between theobject-side surface and the image-side surface of the first lens 1000.

In the examples illustrated in FIGS. 57 and 58 , a spacer is disposedbetween each pair of adjacent lenses. At least a portion of the rib ofeach lens is in contact with one or two of the spacers. The spacersmaintain spacings between the lenses, and block stray light fromreaching the imaging plane.

The spacers include a first spacer SP1, a second spacer SP2, a thirdspacer SP3, a fourth spacer SP4, a fifth spacer SP5, and a sixth spacerSP6 disposed from the object side of the optical imaging system 100toward the image sensor. In some examples, the spacers further include aseventh spacer SP7.

The first spacer SP1 is disposed between the first lens 1000 and thesecond lens 2000, the second spacer SP2 is disposed between the secondlens 2000 and the third lens 3000, the third spacer SP3 is disposedbetween the third lens 3000 and the fourth lens 4000, the fourth spacerSP4 is disposed between the fourth lens 4000 and the fifth lens 5000,the fifth spacer SP5 is disposed between the fifth lens 5000 and thesixth lens 6000, and the sixth spacer SP6 is disposed between the sixthlens 6000 and the seventh lens 7000. When the seventh spacer SP7 isincluded, the seventh spacer SP7 is disposed between the sixth lens 6000and the sixth spacer SP6. A thickness of the seventh spacer SP7 in anoptical axis direction may be greater than a thickness of the sixthspacer SP6 in the optical axis direction.

The first lens has a positive refractive power or a negative refractivepower. In addition, the first lens may have a meniscus shape of which anobject-side surface is convex. In detail, an object-side surface of thefirst lens may be convex, and an image-side surface thereof may beconcave.

At least one of the object-side surface and the image-side surface ofthe first lens may be aspherical. For example, both surfaces of thefirst lens may be aspherical.

The second lens has a positive refractive power or a negative refractivepower. In addition, the second lens may have a meniscus shape of whichan object-side surface is convex. In detail, an object-side surface ofthe second lens may be convex, and an image-side surface thereof may beconcave.

Alternatively, both surfaces of the second lens may be convex. Indetail, the object-side surface and the image-side surface of the secondlens may be convex.

At least one of the object-side surface and the image-side surface ofthe second lens may be aspherical. For example, both surfaces of thesecond lens may be aspherical.

The third lens has a positive refractive power or a negative refractivepower. In addition, the third lens may have a meniscus shape of which anobject-side surface is convex. In detail, an object-side surface of thethird lens may be convex, and an image-side surface thereof may beconcave.

Alternatively, both surfaces of the third lens may be convex. In detail,the object-side surface and the image-side surface of the third lens maybe convex.

Alternatively, the third lens may have a meniscus shape of which animage-side surface is convex. In detail, an object-side surface of thethird lens may be concave, and an image-side surface thereof may beconvex.

At least one of the object-side surface and the image-side surface ofthe third lens may be aspherical. For example, both surfaces of thethird lens may be aspherical.

The fourth lens has a positive refractive power or a negative refractivepower. In addition, the fourth lens may have a meniscus shape of whichan object-side surface is convex. In detail, an object-side surface ofthe fourth lens may be convex, and an image-side surface thereof may beconcave.

Alternatively, both surfaces of the fourth lens may be convex. Indetail, the object-side surface and the image-side surface of the fourthlens may be convex.

Alternatively, the fourth lens may have a meniscus shape of which animage-side surface is convex. In detail, an object-side surface of thefourth lens may be concave, and an image-side surface thereof may beconvex.

At least one of the object-side surface and the image-side surface ofthe fourth lens may be aspherical. For example, both surfaces of thefourth lens may be aspherical.

The fifth lens has a positive refractive power or a negative refractivepower. In addition, the fifth lens may have a meniscus shape of which anobject-side surface is convex. In detail, an object-side surface of thefifth lens may be convex, and an image-side surface thereof may beconcave.

Alternatively, the fifth lens may have a meniscus shape of which animage-side surface is convex. In detail, an object-side surface of thefifth lens may be concave, and an image-side surface thereof may beconvex.

At least one of the object-side surface and the image-side surface ofthe fifth lens may be aspherical. For example, both surfaces of thefifth lens may be aspherical.

The sixth lens has a positive refractive power or a negative refractivepower. In addition, the sixth lens may have a meniscus shape of which anobject-side surface is convex. In detail, an object-side surface of thesixth lens may be convex, and an image-side surface thereof may beconcave.

Alternatively, both surfaces of the sixth lens may be convex. In detail,the object-side surface and the image-side surface of the sixth lens maybe convex.

Alternatively, the sixth lens may have a meniscus shape of which animage-side surface is convex. In detail, an object-side surface of thesixth lens may be concave, and an image-side surface thereof may beconvex.

Alternatively, both surfaces of the sixth lens may be concave. Indetail, the object-side surface and the image-side surface of the sixthlens may be concave.

At least one of the object-side surface and the image-side surface ofthe sixth lens may be aspherical. For example, both surfaces of thesixth lens may be aspherical.

The seventh lens has a positive refractive power or a negativerefractive power. In addition, the seventh lens may have a meniscusshape of which an object-side surface is convex. In detail, anobject-side surface of the seventh lens may be convex, and an image-sidesurface thereof may be concave.

Alternatively, both surfaces of the seventh lens may be concave. Indetail, the object-side surface and the image-side surface of theseventh lens may be concave.

At least one of the object-side surface and the image-side surface ofthe seventh lens may be aspherical. For example, both surfaces of theseventh lens may be aspherical.

In addition, at least one inflection point may be formed on at least oneof the object-side surface and the image-side surface of the seventhlens. An inflection point is a point where a lens surface changes fromconvex to concave, or from concave to convex. A number of inflectionpoints is counted from a center of the lens to an outer edge of theoptical portion of the lens. For example, the object-side surface of theseventh lens may be convex in a paraxial region, and become concavetoward an edge thereof. The image-side surface of the seventh lens maybe concave in a paraxial region, and become convex toward an edgethereof.

FIG. 59 is a cross-sectional view illustrating an example of a shape ofa rib of a seventh lens.

Light reflected from the object (or the subject) may be refracted by thefirst to seventh lenses. In this case, an unintended reflection of thelight may occur. The unintended reflection of the light, which is lightunrelated to formation of an image, may cause a flare phenomenon in acaptured image.

The examples of the optical imaging system 100 described in thisapplication may include a structure for preventing a flare phenomenonand reflection.

For example, as illustrated in FIG. 59 , a rib of the seventh lens 7000disposed closest to the image sensor includes a surface-treated area EA.The surface-treated area EA is a portion of a surface of the rib thathas been surface-treated to be rougher than other portions of thesurface of the rib. For example, the surface-treated area EA may beformed by chemical etching, physical grinding, or any other surfacetreatment method capable of increasing a roughness of a surface. Thesurface-treated area EA scatters reflected light.

Therefore, even though the unintended reflection of the light may occur,the reflected light is prevented from being concentrated at one point,and therefore the occurrence of the flare phenomenon may be suppressed.

The surface-treated area EA may be formed in an entire area from an edgeof the optical portion of the seventh lens 7000 through which lightactually passes to an outer end of the rib. However, as illustrated inFIG. 59 , non-treated areas NEA including step portions E11, E21, andE22 may not be surface-treated, or may be surface-treated to have aroughness less than a roughness of the surface-treated area EA. The stepportions E11, E21, and E22 are portions where the thickness of the ribabruptly changes. A first non-treated area NEA formed on an object-sidesurface of the seventh lens 7000 and including a first step portion E11and a second non-treated area NEA formed on an image-side surface of theseventh lens 7000 and including a second step portion E12 and a thirdstep portion E22 may overlap each other when viewed in the optical axisdirection.

A width G1 of the first non-treated area NEA formed on the object-sidesurface of the seventh lens 7000 may be different from a width G2 of thesecond non-treated area NEA formed on the image-side surface of theseventh lens 7000. In the example illustrated in FIG. 59 , G1 is greaterthan G2.

The width G1 of the first non-treated area NEA includes the first stepportion E11, the second step portion E21, and the third step portion E22when viewed in the optical axis direction, and the width G2 of thesecond non-treated area includes the second step portion E21 and thethird step portion E22 but not the first step portion E11 when viewed inthe optical axis direction. A distance G4 from the outer end of the ribto the second step portion E21 is smaller than a distance G3 from theouter end of the rib to the first step portion E11. Similarly, adistance G5 from the outer end of the rib to the third step portion E22is smaller than the distance G3 from the outer end of the rib to thefirst step portion E11.

The positions at which the non-treated areas NEA and the step portionsE11, E21, and E22 are formed as described above and shown in FIG. 59 maybe advantageous for measuring a concentricity of the seventh lens 7000.

The lenses of the optical imaging system may be made of a light materialhaving a high light transmittance. For example, the first to seventhlenses may be made of a plastic material. However, a material of thefirst to seventh lenses is not limited to the plastic material.

In addition, the first to seventh lenses may have at least oneaspherical surface. That is, at least one of the object-side surface andthe image-side surface of all of the first to seventh lenses may beaspherical. The aspherical surfaces of the first to seventh lenses maybe represented by the following Equation 1:

$\begin{matrix}{Z = {\frac{{cY}^{2}}{1 + \sqrt{1 - {\left( {1 + K} \right)c^{2}Y^{2}}}} + {AY}^{4} + {BY}^{6} + {CY}^{8} + {DY}^{10} + {EY}^{12} + {FY}^{14} + {GY}^{16} + {HY}^{18} + \ldots}} & (1)\end{matrix}$

In Equation 1, c is a curvature of a lens surface and is equal to aninverse of a radius of curvature of the lens surface at an optical axisof the lens surface, K is a conic constant, Y is a distance from acertain point on an aspherical surface of the lens to an optical axis ofthe lens in a direction perpendicular to the optical axis, A to H areaspherical constants, Z (or sag) is a distance between the certain pointon the aspherical surface of the lens at the distance Y to the opticalaxis and a tangential plane perpendicular to the optical axis meetingthe apex of the aspherical surface of the lens. Some of the examplesdisclosed in this application include an aspherical constant J. Anadditional term of JY²⁰ may be added to the right side of Equation 1 toreflect the effect of the aspherical constant J.

The optical imaging system may satisfy one or more of the followingConditional Expressions 1 to 5:

0.1<L1w/L7w<0.4  (Conditional Expression 1)

0.5<S6d/f<1.4  (Conditional Expression 2)

0.4<L1TR/L7TR<1.9  (Conditional Expression 3)

0.5<L1234TRavg/L7TR<0.9  (Conditional Expression 4)

0.5<L12345TRavg/L7TR<0.9  (Conditional Expression 5)

In the above Conditional Expressions, L1w is a weight of the first lens,and L7w is a weight of the seventh lens.

S6d is an inner diameter of the sixth spacer, and f is an overall focallength of the optical imaging system.

L1TR is an overall outer diameter of the first lens, and L7TR is anoverall outer diameter of the seventh lens. The overall outer diameterof a lens is an outer diameter of the lens including both the opticalportion of the lens and the rib of the lens.

L1234TRavg is an average value of overall outer diameters of the firstto fourth lenses, and L12345TRavg is an average value of overall outerdiameters of the first to fifth lenses.

Conditional Expression 1 is a conditional expression related to a weightratio between the first lens and the seventh lens, and when ConditionalExpression 1 is satisfied, optical axes may be easily aligned with oneanother through contact between the respective lenses and contactbetween the lenses and the lens barrel.

Conditional Expression 2 is a conditional expression related to a ratiobetween the inner diameter of the sixth spacer disposed between thesixth lens and the seventh lens and the overall focal length of theoptical imaging system, and when Conditional Expression 2 is satisfied,the flare phenomenon due to the unintended reflection of the light maybe suppressed.

Conditional Expression 3 is a conditional expression related to a ratiobetween the overall outer diameter of the first lens and the overallouter diameter of the seventh lens, and when Conditional Expression 3 issatisfied, optical axes may be easily aligned with one another throughcontact between the respective lenses and contact between the lenses andthe lens barrel.

Conditional Expression 4 is a conditional expression related to a ratiobetween the average value of the overall outer diameters of the first tofourth lenses and the overall outer diameter of the seventh lens, andwhen Conditional Expression 4 is satisfied, aberration may be easilycorrected to improve resolution.

Conditional Expression 5 is a conditional expression related to a ratiobetween the average value of the overall outer diameters of the first tofifth lenses and the overall outer diameter of the seventh lens, andwhen Conditional Expression 5 is satisfied, aberration may be easilycorrected to improve resolution.

The optical imaging system may also satisfy one or more of the followingConditional Expressions 6 to 10:

0.1<L1w/L7w<0.3  (Conditional Expression 6)

0.5<S6d/f<1.2  (Conditional Expression 7)

0.4<L1TR/L7TR<0.7  (Conditional Expression 8)

0.5<L1234TRavg/L7TR<0.75  (Conditional Expression 9)

0.5<L12345TRavg/L7TR<0.76  (Conditional Expression 10)

Conditional Expressions 6 to 10 are the same as Conditional Expressions1 to 5, except that Conditional Expressions 6 to 10 specify narrowerranges.

The optical imaging system may also satisfy one or more of the followingConditional Expressions 11 to 32:

0.01<R1/R4<1.3  (Conditional Expression 11)

0.1<R1/R5<0.7  (Conditional Expression 12)

0.05<R1/R6<0.9  (Conditional Expression 13)

0.2<R1/R11<1.2  (Conditional Expression 14)

0.8<R1/R14<1.2  (Conditional Expression 15)

0.6<(R11+R14)/(2*R1)<3.0  (Conditional Expression 16)

0.4<D13/D57<1.2  (Conditional Expression 17)

0.1<(1/f1+1/f2+1/f3+1/f4+1/f5+1/f6+1/f7)*f<0.8  (Conditional Expression18)

0.1<(1/f1+1/f2+1/f3+1/f4+1/f5+1/f6+1/f7)*TTL<1.0   (ConditionalExpression 19)

0.2<TD1/D67<0.8  (Conditional Expression 20)

0.1<(R11+R14)/(R5+R6)<1.0  (Conditional Expression 21)

SD12<SD34  (Conditional Expression 22)

SD56<SD67  (Conditional Expression 23)

SD56<SD34  (Conditional Expression 24)

0.6<TTL/(2*IMG HT)<0.9  (Conditional Expression 25)

0.2<ΣSD/ΣTD<0.7  (Conditional Expression 26)

0<min(f1:f3)/max(f4:f7)<0.4  (Conditional Expression 27)

0.4<ΣTD/TTL<0.7  (Conditional Expression 28)

0.7<SL/TTL<1.0  (Conditional Expression 29)

0.81<f12/f123<0.96  (Conditional Expression 30)

0.6<f12/f1234<0.84  (Conditional Expression 31)

TTL≤6.00  (Conditional Expression 32)

In the above Conditional Expressions, R1 is a radius of curvature of anobject-side surface of the first lens, R4 is a radius of curvature of animage-side surface of the second lens, R5 is a radius of curvature of anobject-side surface of the third lens, R6 is a radius of curvature of animage-side surface of the third lens, R11 is a radius of curvature of anobject-side surface of the sixth lens, R14 is a radius of curvature ofan image-side surface of the seventh lens.

D13 is a distance along an optical axis of the optical imaging systemfrom the object-side surface of the first lens to the image-side surfaceof the third lens, and D57 is a distance along the optical axis from anobject-side surface of the fifth lens to the image-side surface of theseventh lens.

f1 is a focal length of the first lens, f2 is a focal length of thesecond lens, f3 is a focal length of the third lens, f4 is a focallength of the fourth lens, f5 is a focal length of the fifth lens, f6 isa focal length of the sixth lens, f7 is a focal length of the seventhlens, f is an overall focal length of the optical imaging system, andTTL is a distance along the optical axis from the object-side surface ofthe first lens to an imaging plane of an image sensor of the opticalimaging system.

TD1 is a thickness along the optical axis of the first lens, and D67 isa distance along the optical axis from the object-side surface of thesixth lens to the image-side surface of the seventh lens.

SD12 is a distance along the optical axis from an image-side surface ofthe first lens to an object-side surface of the second lens, SD34 is adistance along the optical axis from the image-side surface of the thirdlens to an object-side surface of the fourth lens, SD56 is a distancealong the optical axis from an image-side surface of the fifth lens tothe object-side surface of the sixth lens, and SD67 is a distance alongthe optical axis from an image-side surface of the sixth lens to anobject-side surface of the seventh lens.

IMG HT is one-half of a diagonal length of the imaging plane of theimage sensor.

ΣSD is a sum of air gaps along the optical axis between the first toseventh lenses, and ΣTD is a sum of thicknesses along the optical axisof the first to seventh lenses. An air gap is a distance along theoptical axis between adjacent ones of the first to seventh lenses.

min(f1:f3) is a minimum value of absolute values of the focal lengths ofthe first to third lenses, and max(f4:f7) is a maximum value of absolutevalues of the focal lengths of the fourth to seventh lenses.

SL is a distance along the optical axis from the stop to the imagingplane of the image sensor.

f12 is a composite focal length of the first and second lenses, f123 isa composite focal length of the first to third lenses, and f1234 is acomposite focal length of the first to fourth lenses.

When Conditional Expression 11 is satisfied, correction effects oflongitudinal spherical aberration and astigmatic field curves may beimproved, and resolution may thus be improved.

When Conditional Expression 12 is satisfied, correction effects oflongitudinal spherical aberration and astigmatic field curves may beimproved, and resolution may thus be improved.

When Conditional Expression 13 is satisfied, correction effects oflongitudinal spherical aberration and astigmatic field curves may beimproved, and resolution may thus be improved.

When Conditional Expression 14 is satisfied, a correction effect oflongitudinal spherical aberration may be improved, and the flarephenomenon may be prevented. Therefore, resolution may be improved.

When Conditional Expression 15 is satisfied, a correction effect oflongitudinal spherical aberration may be improved, and an imaging planecurvature phenomenon may be suppressed. Therefore, resolution may beimproved.

When Conditional Expression 16 is satisfied, a correction effect oflongitudinal spherical aberration may be improved, an imaging planecurvature phenomenon may be suppressed, and the flare phenomenon may beprevented. Therefore, resolution may be improved.

When Conditional Expression 17 is satisfied, a slim optical imagingsystem may be implemented.

When Conditional Expression 18 is satisfied, sensitivity of each lensmay be improved to improve mass productivity.

When Conditional Expression 20 is satisfied, a slim optical imagingsystem may be implemented.

When Conditional Expression 22 is satisfied, a chromatic aberrationcorrection effect may be improved.

When Conditional Expression 25 is satisfied, a slim optical imagingsystem may be implemented.

When Conditional Expression 26 is satisfied, mass productivity of eachlens may be improved, and a slim optical imaging system may beimplemented.

When Conditional Expression 27 is satisfied, a slim optical imagingsystem may be implemented.

When Conditional Expression 28 is satisfied, mass productivity of eachlens may be improved, and a slim optical imaging system may beimplemented.

When Conditional Expression 29 is satisfied, a slim optical imagingsystem may be implemented.

When Conditional Expression 30 is satisfied, a slim optical imagingsystem may be implemented.

When Conditional Expression 31 is satisfied, a slim optical imagingsystem may be implemented.

Next, various examples of the optical imaging system will be described.In the tables that appear in the following examples, S1 denotes anobject-side surface of a first lens, S2 denotes an image-side surface ofthe first lens, S3 denotes an object-side surface of a second lens, S4denotes an image-side surface of the second lens, S5 denotes anobject-side surface of a third lens, S6 denotes an image-side surface ofthe third lens, S7 denotes an object-side surface of a fourth lens, S8denotes an image-side surface of the fourth lens, S9 denotes anobject-side surface of a fifth lens, S10 denotes an image-side surfaceof the fifth lens, S11 denotes an object-side surface of a sixth lens,S12 denotes an image-side surface of the sixth lens, S13 denotes anobject-side surface of a seventh lens, S14 denotes an image-side surfaceof the seventh lens, S15 denotes an object-side surface of a filter, S16denotes an image-side surface of the filter, and S17 denotes an imagingplane.

First Example

FIG. 1 is a view illustrating a first example of an optical imagingsystem, and FIG. 2 illustrates aberration curves of the optical imagingsystem of FIG. 1 .

The first example of the optical imaging system includes a first lens110, a second lens 120, a third lens 130, a fourth lens 140, a fifthlens 150, a sixth lens 160, a seventh lens 170, a filter 180, an imagesensor 190, and a stop (not shown) disposed between the first lens 110and the second lens 120.

The first lens 110 has a positive refractive power, a paraxial region ofan object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The second lens 120 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The third lens 130 has a positive refractive power, and a paraxialregion of each of an object-side surface and an image-side surfacethereof is convex.

The fourth lens 140 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fifth lens 150 has a negative refractive power, a paraxial region ofan object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The sixth lens 160 has a positive refractive power, and a paraxialregion of each of an object-side surface and an image-side surfacethereof is convex.

The seventh lens 170 has a negative refractive power, and a paraxialregion of each of an object-side surface and an image-side surfacethereof is concave.

One inflection point is formed on the object-side surface of the seventhlens 170. In particular, the object-side surface of the seventh lens 170is concave in the paraxial region, and becomes convex toward an edgethereof.

In addition, one inflection point is formed on the image-side surface ofthe seventh lens 170. In particular, the image-side surface of theseventh lens 170 is concave in the paraxial region, and becomes convextoward an edge thereof.

Although not illustrated in FIG. 1 , the stop is disposed at a distanceof 0.929 mm from the object-side surface of the first lens 110 towardthe imaging plane of the optical imaging system. This distance is equalto TTL-SL and can be calculated from the values of TTL and SL forExample 1 listed in Table 57 that appears later in this application.

Table 1 below shows physical properties of the lenses and other elementsof the optical imaging system of FIG. 1 , and Table 2 below showsaspherical surface coefficients of the lenses of FIG. 1 . Both surfacesof all of the lenses of FIG. 1 are aspherical except for the object-sidesurface of the second lens 120, which is spherical.

TABLE 1 Effective Surface Radius of Thickness/ Index of Abbe ApertureNo. Element Curvature Distance Refraction Number Radius S1 First2.0856092 0.9292118 1.546 56.114 1.59 S2 Lens 8.93043513 0.1200399 1.53S3 Second 5.86244103 0.23 1.669 20.353 1.43 S4 Lens 3.38051351 0.38664611.26 S5 Third 18.3857198 0.5076267 1.546 56.114 1.35 S6 Lens −65.415450.1166172 1.43 S7 Fourth 7.98746366 0.26 1.669 20.353 1.45 S8 Lens6.4766936 0.2853054 1.61 S9 Fifth 58.6668676 0.3539979 1.644 23.516 1.74S10 Lens 7.23744347 0.2316773 2.00 S11 Sixth 3.60524352 0.7682194 1.54656.114 2.24 S12 Lens −2.4011013 0.5228213 2.49 S13 Seventh −2.52410070.38 1.546 56.114 3.26 S14 Lens 3.01958733 0.107837 3.38 S15 FilterInfinity 0.11 1.519 64.197 3.66 S16 Infinity 0.69 3.69 S17 ImagingInfinity 4.00 Plane

TABLE 2 K A B C D S1 −1.08941 0.013187 0.009962 −0.01583 0.018971 S212.57642 −0.04786 0.041598 −0.02674 0.011876 S3 0 0 0 0 0 S4 −1.83147−0.06555 0.065057 −0.0107 −0.02653 S5 0 −0.02189 −0.00092 −0.0210.023433 S6 −95 −0.0632 −0.00174 0.021978 −0.05295 S7 0 −0.1339 0.057694−0.15773 0.257112 S8 0 −0.1017 0.077852 −0.15614 0.199503 S9 0 −0.120520.152814 −0.15655 0.114747 S10 3.458235 −0.18471 0.140789 −0.108910.070568 S11 −19.5338 −0.01378 −0.01807 0.002094 0.001582 S12 −0.758180.09278 −0.06699 0.021292 −0.0052 S13 −14.2476 −0.09472 −0.003770.015632 −0.00476 S14 −0.57988 −0.09619 0.026231 −0.00426 0.000309 E F GH J S1 −0.01385 0.006018 −0.00143 0.000134 0 S2 −0.00481 0.001502−0.00027 1.69E−05 0 S3 0 0 0 0 0 S4 0.029888 −0.01246 0.001484 0.0004160 S5 −0.0118 −0.00341 0.005424 −0.00134 0 S6 0.060706 −0.04155 0.015887−0.00255 0 S7 −0.23831 0.127642 −0.03688 0.004447 0 S8 −0.15311 0.069086−0.01708 0.001797 0 S9 −0.05967 0.019523 −0.00362 0.000296 0 S10−0.03223 0.008954 −0.00133 8.01E−05 0 S11 −0.0008 0.00013 −2.5E−06−6.7E−07 0 S12 0.001388 −0.00027  2.7E−05 −1.1E−06 0 S13 0.000702−5.8E−05 2.53E−06 −4.7E−08 0 S14 8.85E−06 −3.9E−06 3.28E−07 −1.2E−081.61E−10

Second Example

FIG. 3 is a view illustrating a second example of an optical imagingsystem, and FIG. 4 illustrates aberration curves of the optical imagingsystem of FIG. 3 .

The second example of the optical imaging system includes a first lens210, a second lens 220, a third lens 230, a fourth lens 240, a fifthlens 250, a sixth lens 260, a seventh lens 270, a filter 280, an imagesensor 290, and a stop (not shown) disposed between the first lens 210and the second lens 220.

The first lens 210 has a positive refractive power, a paraxial region ofan object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The second lens 220 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The third lens 230 has a positive refractive power, and a paraxialregion of each of an object-side surface and an image-side surfacethereof is convex.

The fourth lens 240 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fifth lens 250 has a negative refractive power, a paraxial region ofan object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The sixth lens 260 has a positive refractive power, and a paraxialregion of each of an object-side surface and an image-side surfacethereof is convex.

The seventh lens 270 has a negative refractive power, a paraxial regionof an object-side surface thereof is concave, and a paraxial region ofan image-side surface thereof is concave.

One inflection point is formed on the object-side surface of the seventhlens 270. In particular, the object-side surface of the seventh lens 270is concave in the paraxial region, and becomes convex toward an edgethereof.

In addition, one inflection point is formed on the image-side surface ofthe seventh lens 270. In particular, the image-side surface of theseventh lens 270 is concave in the paraxial region, and becomes convextoward an edge thereof.

Although not illustrated in FIG. 3 , the stop is disposed at a distanceof 0.954 mm from the object-side surface of the first lens 210 towardthe imaging plane of the optical imaging system. This distance is equalto TTL-SL and can be calculated from the values of TTL and SL forExample 2 listed in Table 57 that appears later in this application.

Table 3 below shows physical properties of the lenses and other elementsof the optical imaging system of FIG. 3 , and Table 4 below showsaspherical surface coefficients of the lenses of FIG. 3 . Both surfacesof all of the lenses of FIG. 3 are aspherical except for the object-sidesurface of the second lens 220, which is spherical.

TABLE 3 Effective Surface Radius of Thickness/ Index of Abbe ApertureNo. Element Curvature Distance Refraction Number Radius S1 First2.09523177 0.9535556 1.546 56.114 1.63 S2 Lens 8.9751949 0.1222166 1.56S3 Second 5.87072709 0.23 1.669 20.353 1.45 S4 Lens 3.37511591 0.38242621.28 S5 Third 16.2065401 0.4972101 1.546 56.114 1.35 S6 Lens −139.894620.1167997 1.43 S7 Fourth 7.40791882 0.26 1.669 20.353 1.44 S8 Lens6.08803731 0.2808933 1.61 S9 Fifth 38.3058612 0.3659631 1.644 23.5161.74 S10 Lens 6.70285435 0.2283896 2.00 S11 Sixth 3.49003116 0.77338431.546 56.114 2.23 S12 Lens −2.3502414 0.5034976 2.49 S13 Seventh−2.464576 0.38 1.546 56.114 3.26 S14 Lens 3.03579165 0.1056639 3.37 S15Filter Infinity 0.11 1.519 64.197 3.67 S16 Infinity 0.69 3.70 S17Imaging Infinity 4.00 Plane

TABLE 4 K A B C D S1 −1.10381 0.012898 0.009879 −0.01571 0.018687 S213.09551 −0.04765 0.043287 −0.03135 0.017346 S3 0 0 0 0 0 S4 −1.83331−0.06675 0.070325 −0.02257 −0.00885 S5 0 −0.02215 0.000148 −0.022370.025134 S6 −95 −0.06308 −0.00187 0.021015 −0.04859 S7 0 −0.133640.059514 −0.16508 0.269468 S8 0 −0.10179 0.07915 −0.15722 0.198605 S9 0−0.11882 0.149294 −0.14949 0.107127 S10 2.859774 −0.18537 0.141763−0.11055 0.071846 S11 −19.5338 −0.01212 −0.01555 −0.00129 0.003885 S12−0.81308 0.09292 −0.06559 0.020026 −0.00471 S13 −13.479 −0.09591 −0.00470.016588 −0.00506 S14 −0.59135 −0.09685 0.02646 −0.00421 0.000279 E F GH J S1 −0.01362 0.005924 −0.00141 0.000134 0 S2 −0.00841 0.002867−0.00055 4.24E−05 0 S3 0 0 0 0 0 S4 0.012981 −0.00247 −0.00187 0.0008890 S5 −0.01334 −0.00223 0.00481 −0.00122 0 S6 0.053351 −0.03506 0.013045−0.00206 0 S7 −0.25157 0.136766 −0.0403 0.00497 0 S8 −0.15112 0.067755−0.01665 0.00174 0 S9 −0.05474 0.017607 −0.00319 0.000255 0 S10 −0.032760.009077 −0.00134 8.07E−05 0 S11 −0.00177 0.000369 −3.4E−05 9.95E−07 0S12 0.001294 −0.00026 2.67E−05 −1.1E−06 0 S13 0.00075 −6.2E−05 2.73E−06 −5E−08 0 S14 1.49E−05 −4.5E−06 3.64E−07 −1.3E−08 1.67E−10

Third Example

FIG. 5 is a view illustrating a third example of an optical imagingsystem, and FIG. 6 illustrates aberration curves of the optical imagingsystem of FIG. 5 .

The third example of the optical imaging system includes a first lens310, a second lens 320, a third lens 330, a fourth lens 340, a fifthlens 350, a sixth lens 360, a seventh lens 370, a filter 380, an imagesensor 390, and a stop (not shown) disposed between the second lens 320and the third lens 330.

The first lens 310 has a positive refractive power, a paraxial region ofan object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The second lens 320 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The third lens 330 has a positive refractive power, a paraxial region ofan object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fourth lens 340 has a positive refractive power, and a paraxialregion of each of an object-side surface and an image-side surfacethereof is convex.

The fifth lens 350 has a negative refractive power, a paraxial region ofan object-side surface thereof is concave, and a paraxial region of animage-side surface thereof is convex.

The sixth lens 360 has a positive refractive power, a paraxial region ofan object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The seventh lens 370 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

Two inflection points are formed on the object-side surface of theseventh lens 370. In particular, the object-side surface of the seventhlens 370 is convex in the paraxial region, becomes concave in a regionoutside the paraxial region, and becomes convex toward an edge thereof.

In addition, one inflection point is formed on the image-side surface ofthe seventh lens 370. In particular, the image-side surface of theseventh lens 370 is concave in the paraxial region, and becomes convextoward an edge thereof.

Although not illustrated in FIG. 5 , the stop is disposed at a distanceof 0.977 mm from the object-side surface of the first lens 310 towardthe imaging plane of the optical imaging system. This distance is equalto TTL-SL and can be calculated from the values of TTL and SL forExample 3 listed in Table 57 that appears later in this application.

Table 5 below shows physical properties of the lenses and other elementsof the optical imaging system of FIG. 5 , and Table 6 below showsaspherical surface coefficients of the lenses of FIG. 5 . Both surfacesof all of the lenses of FIG. 5 are aspherical.

TABLE 5 Effective Surface Radius of Thickness/ Index of Abbe ApertureNo. Element Curvature Distance Refraction Number Radius S1 First1.82391792 0.7125976 1.546 56.114 1.29 S2 Lens 7.84659281 0.0641189 1.24S3 Second 7.25645695 0.2 1.669 20.353 1.19 S4 Lens 3.22746768 0.18334421.11 S5 Third 3.55978049 0.289782 1.546 56.114 1.07 S6 Lens 5.375404470.3323457 1.09 S7 Fourth 108.917864 0.3185673 1.546 56.114 1.14 S8 Lens−25.473189 0.3581803 1.31 S9 Fifth −10.246565 0.32 1.658 21.494 1.52 S10Lens −2511.6237 0.1796019 1.82 S11 Sixth 2.24163583 0.5032143 1.65821.494 2.09 S12 Lens 2.29949488 0.405792 2.46 S13 Seventh 2.251601130.563893 1.537 55.711 3.10 S14 Lens 1.62924582 0.1385632 3.13 S15 FilterInfinity 0.11 1.519 64.197 3.58 S16 Infinity 0.7200239 3.61 S17 ImagingInfinity 4.00 Plane

TABLE 6 K A B C D E F G H S1 −0.05681 −0.00382 0.005709 −0.019030.017159 −0.00924 0.001372 −9.6E−05 0 S2 −25.6173 −0.01646 −0.076160.132063 −0.11427 0.054558 −0.01426 0.001526 0 S3 −23.4928 −0.03092−0.07642 0.205444 −0.20566 0.115946 −0.03485 0.004323 0 S4 −2.4185−0.029 −0.02587 0.11758 −0.1178 0.048002 0.01085 −0.00984 0 S5 1.638831−0.0558 0.001053 −0.0238 0.077823 −0.07273 0.054265 −0.01613 0 S6−1.64854 −0.03653 −0.00816 0.035786 −0.0842 0.148028 −0.10368 0.031151 0S7 99 −0.07525 0.043317 −0.2362 0.448729 −0.47604 0.273589 −0.06373 0 S887.32309 −0.04708 0.003053 −0.09209 0.13981 −0.10712 0.045592 −0.00772 0S9 3.284997 0.045871 −0.12833 0.159561 −0.16448 0.094896 −0.02780.003303 0 S10 −99 −0.03644 −0.03317 0.063386 −0.06646 0.033384 −0.007630.000644 0 S11 −16.0412 0.004354 −0.06522 0.059141 −0.0406 0.014529−0.00241 0.000149 0 S12 −18.2699 −0.02906 0.016429 −0.01576 0.005873−0.00116 0.000124 −5.6E−06 0 S13 −0.89844 −0.33707 0.157271 −0.044520.007967 −0.00085 4.89E−05 −1.1E−06  −5.4E−09 S14 −0.82188 −0.267880.125454 −0.04542 0.011249 −0.00179 0.000173 −9.2E−06   2.05E−07

Fourth Example

FIG. 7 is a view illustrating a fourth example of an optical imagingsystem, and FIG. 8 illustrates aberration curves of the optical imagingsystem of FIG. 7 .

The fourth example of the optical imaging system includes a first lens410, a second lens 420, a third lens 430, a fourth lens 440, a fifthlens 450, a sixth lens 460, a seventh lens 470, a filter 480, an imagesensor 490, and a stop (not shown) disposed between the second lens 420and the third lens 430.

The first lens 410 has a positive refractive power, a paraxial region ofan object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The second lens 420 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The third lens 430 has a positive refractive power, a paraxial region ofan object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fourth lens 440 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fifth lens 450 has a negative refractive power, a paraxial region ofan object-side surface thereof is concave, and a paraxial region of animage-side surface thereof is convex.

The sixth lens 460 has a positive refractive power, a paraxial region ofan object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The seventh lens 470 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

Two inflection points are formed on the object-side surface of theseventh lens 470. In particular, the object-side surface of the seventhlens 470 is convex in the paraxial region, becomes concave in a regionoutside the paraxial region, and becomes convex toward an edge thereof.

In addition, one inflection point is formed on the image-side surface ofthe seventh lens 470. In particular, the image-side surface of theseventh lens 470 is concave in the paraxial region, and becomes convextoward an edge thereof.

Although not illustrated in FIG. 7 , the stop is disposed at a distanceof 1.062 mm from the object-side surface of the first lens 410 towardthe imaging plane of the optical imaging system. This distance is equalto TTL-SL and can be calculated from the values of TTL and SL forExample 4 listed in Table 57 that appears later in this application.

Table 7 below shows physical properties of the lenses and other elementsof the optical imaging system of FIG. 7 , and Table 8 below showsaspherical surface coefficients of the lenses of FIG. 7 . Both surfacesof all of the lenses of FIG. 7 are aspherical.

TABLE 7 Effective Surface Radius of Thickness/ Index of Abbe ApertureNo. Element Curvature Distance Refraction Number Radius S1 First2.02988734 0.8071808 1.546 56.114 1.50 S2 Lens 13.3648006 0.03 1.47 S3Second 4.79376157 0.225 1.669 20.353 1.41 S4 Lens 2.78744479 0.22234331.30 S5 Third 4.82360261 0.2898759 1.546 56.114 1.24 S6 Lens 8.149508850.3234802 1.21 S7 Fourth 7.95169453 0.2896338 1.546 56.114 1.24 S8 Lens13.2949054 0.2359829 1.35 S9 Fifth −5.3395632 0.3051644 1.658 21.4941.41 S10 Lens −10.758919 0.2260567 1.65 S11 Sixth 4.03734585 0.85 1.65821.494 1.75 S12 Lens 4.00738375 0.2243888 2.57 S13 Seventh 3.398586550.7824535 1.537 55.711 3.30 S14 Lens 2.20528309 0.1384397 3.22 S15Filter Infinity 0.11 1.519 64.197 3.59 S16 Infinity 0.6900019 3.62 S17Imaging Infinity 3.94 Plane

TABLE 8 K A B C D E F G H S1 0.055002 −0.00862 0.019719 −0.048780.061416 −0.04738 0.021289 −0.00524 0.000528 S2 −26.0973 −0.042920.055554 −0.07536 0.066566 −0.03618 0.01155 −0.00207 0.000165 S3−36.1351 −0.04162 0.048893 −0.07864 0.079391 −0.04337 0.014109 −0.002970.000356 S4 −7.66553 −0.0165 0.01116 −0.03292 0.043974 −0.05263 0.056504−0.0304 0.005911 S5 3.337325 −0.04652 0.049134 −0.1038 0.167627 −0.190240.165026 −0.07793 0.014471 S6 −0.02412 −0.05207 0.019764 0.012674−0.00403 −0.04206 0.094388 −0.06504 0.015741 S7 −66.3047 −0.07065−0.02908 0.041965 −0.11679 0.174957 −0.12258 0.040671 −0.00488 S819.54898 −0.06049 0.012663 −0.10426 0.186276 −0.22707 0.175833 −0.073140.012434 S9 −5.93087 −0.02712 −0.00151 0.063515 −0.12587 0.092909−0.02991 0.003292 0 S10 33.02479 −0.09413 0.02661 0.047806 −0.072020.04396 −0.01237 0.001304 0 S11 −51.3785 0.001924 −0.10804 0.11432−0.08252 0.035053 −0.00798 0.000753 0 S12 −31.504 −0.00904 −0.005610.001398 −0.00039 9.31E−05  −1.2E−05   5.9E−07 0 S13 −0.47616 −0.196170.090781 −0.02708 0.005169 −0.00061   4.35E−05 −1.7E−06 2.73E−08 S14−0.78006 −0.14942 0.059181 −0.01981 0.004571 −0.00067   5.95E−05−2.9E−06 5.85E−08

Fifth Example

FIG. 9 is a view illustrating a fifth example of an optical imagingsystem, and FIG. 10 illustrates aberration curves of the optical imagingsystem of FIG. 9 .

The fifth example of the optical imaging system includes a first lens510, a second lens 520, a third lens 530, a fourth lens 540, a fifthlens 550, a sixth lens 560, a seventh lens 570, a filter 580, an imagesensor 590, and a stop (not shown) disposed between the second lens 520and the third lens 530.

The first lens 510 has a positive refractive power, a paraxial region ofan object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The second lens 520 has a positive refractive power, and a paraxialregion of each of an object-side surface and an image-side surfacethereof is convex.

The third lens 530 has a negative refractive power, a paraxial region ofan object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fourth lens 540 has a positive refractive power, a paraxial regionof an object-side surface thereof is concave, and a paraxial region ofan image-side surface thereof is convex.

The fifth lens 550 has a positive refractive power, a paraxial region ofan object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The sixth lens 560 has a negative refractive power, a paraxial region ofan object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The seventh lens 570 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

Two inflection points are formed on the object-side surface of theseventh lens 570. In particular, the object-side surface of the seventhlens 570 is convex in the paraxial region, becomes concave in a regionoutside the paraxial region, and becomes convex toward an edge thereof.

In addition, one inflection point is formed on the image-side surface ofthe seventh lens 570. In particular, the image-side surface of theseventh lens 570 is concave in the paraxial region, and becomes convextoward an edge thereof.

Although not illustrated in FIG. 9 , the stop is disposed at a distanceof 1.425 mm from the object-side surface of the first lens 510 towardthe imaging plane of the optical imaging system. This distance is equalto TTL-SL and can be calculated from the values of TTL and SL forExample 5 listed in Table 57 that appears later in this application.

Table 9 below shows physical properties of the lenses and other elementsof the optical imaging system of FIG. 9 , and Table 10 below showsaspherical surface coefficients of the lenses of FIG. 9 . Both surfacesof all of the lenses of FIG. 9 are aspherical.

TABLE 9 Effective Surface Radius of Thickness/ Index of Abbe ApertureNo. Element Curvature Distance Refraction Number Radius S1 First2.370605 0.543075 1.546 56.114 1.572 S2 Lens 3.837673 0.151623 1.517 S3Second 3.432869 0.707828 1.546 56.114 1.478 S4 Lens −17.0251 0.0224681.428 S5 Third 5.142878 0.224676 1.679 19.236 1.300 S6 Lens 2.5333260.588782 1.230 S7 Fourth −1446.17 0.340433 1.679 19.236 1.404 S8 Lens−1446.17 0.207036 1.600 S9 Fifth 3.643447 0.326355 1.546 56.114 1.857S10 Lens 3.822446 0.317149 2.199 S11 Sixth 3.850899 0.440632 1.67919.236 2.415 S12 Lens 3.049364 0.177387 2.808 S13 Seventh 1.7430280.613274 1.537 53.955 3.115 S14 Lens 1.56E+00 0.246638 3.314 S15 FilterInfinity 0.11 1.5187 64.1664 3.654985 S16 Infinity 0.8098264 3.687604S17 Imaging Infinity 4.07527 Plane

TABLE 10 K A B C D S1 −7.5196 0.0476 −0.039 0.0108 −0.0002 S2 −19.661−0.0106 −0.0481 0.0183 0.0105 S3 0.042 −0.0249 −0.0196 0.0094 0.0041 S40 0.0098 −0.0507 0.0341 0.0229 S5 −5.6502 −0.0476 0.0152 −0.0398 0.11 S60.5327 −0.067 0.0583 −0.0705 0.0922 S7 0 −0.0158 −0.0083 −0.0305 0.0756S8 0 −0.0099 −0.0427 0.0077 0.0285 S9 −44.395 0.1048 −0.1251 0.08−0.0437 S10 −4.0715 −0.0175 0.0211 −0.0368 0.0252 S11 −1.1211 0.0034−0.0742 0.0637 −0.0381 S12 0.0464 −0.092 0.0339 −0.0168 0.0044 S13−0.795 −0.2987 0.11 −0.0259 0.0046 S14 −1.3233 −0.199 0.0846 −0.02850.0073 E F G H J S1 −0.006 0.0045 −0.0012 0.0001 0 S2 −0.0109 0.0039−0.0006 3E−05 0 S3 0.0108 −0.014 0.0056 −0.0008 0 S4 −0.0518 0.0341−0.0103 0.0012 0 S5 −0.1327 0.082 −0.0252 0.0031 0 S6 −0.0854 0.0499−0.0161 0.0024 0 S7 −0.0736 0.035 −0.0077 0.0005 0 S8 −0.0272 0.01−0.0013 0 0 S9 0.0187 −0.0058 0.001 −7E−05 0 S10 −0.01 0.0024 −0.0003  2E−05 0 S11 0.0134 −0.0026 0.0003 −1E−05 0 S12 −0.0005 1E−05   3E−06−2E−07 0 S13 −0.0007 7E−05 −5E−06   2E−07 −5E−09 S14 −0.0013 0.0002−1E−05   5E−07 −9E−09

Sixth Example

FIG. 11 is a view illustrating a sixth example of an optical imagingsystem, and FIG. 12 illustrates aberration curves of the optical imagingsystem of FIG. 11 .

The sixth example of the optical imaging system includes a first lens610, a second lens 620, a third lens 630, a fourth lens 640, a fifthlens 650, a sixth lens 660, a seventh lens 670, a filter 680, an imagesensor 690, and a stop (not shown) disposed between the second lens 620and the third lens 630.

The first lens 610 has a positive refractive power, a paraxial region ofan object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The second lens 620 has a positive refractive power, and a paraxialregion of each of an object-side surface and an image-side surfacethereof is convex.

The third lens 630 has a negative refractive power, a paraxial region ofan object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fourth lens 640 has a negative refractive power, a paraxial regionof an object-side surface thereof is concave, and a paraxial region ofan image-side surface thereof is convex.

The fifth lens 650 has a positive refractive power, a paraxial region ofan object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The sixth lens 660 has a negative refractive power, a paraxial region ofan object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The seventh lens 670 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

Two inflection points are formed on the object-side surface of theseventh lens 670. In particular, the object-side surface of the seventhlens 670 is convex in the paraxial region, becomes concave in a regionoutside the paraxial region, and becomes convex toward an edge thereof.

In addition, one inflection point is formed on the image-side surface ofthe seventh lens 670. In particular, the image-side surface of theseventh lens 670 is concave in the paraxial region, and becomes convextoward an edge thereof.

Although not illustrated in FIG. 11 , the stop is disposed at a distanceof 1.169 mm from the object-side surface of the first lens 610 towardthe imaging plane of the optical imaging system. This distance is equalto TTL-SL and can be calculated from the values of TTL and SL forExample 6 listed in Table 57 that appears later in this application.

Table 11 below shows physical properties of the lenses and otherelements of the optical imaging system of FIG. 11 , and Table 12 belowshows aspherical surface coefficients of the lenses of FIG. 11 . Bothsurfaces of all of the lenses of FIG. 11 are aspherical.

TABLE 11 Effective Surface Radius of Thickness/ Index of Abbe ApertureNo. Element Curvature Distance Refraction Number Radius S1 First1.951165 0.448752 1.546 56.114 1.307 S2 Lens 3.115162 0.125992 1.253 S3Second 2.868611 0.575289 1.546 56.114 1.214 S4 Lens −12.9825 0.0185631.180 S5 Third 4.506414 0.185629 1.679 19.236 1.074 S6 Lens 2.1968550.519693 1.016 S7 Fourth −2108.87 0.279556 1.679 19.236 1.179 S8 Lens−6755.44 0.171507 1.338 S9 Fifth 3.113522 0.273438 1.546 56.114 1.528S10 Lens 3.267187 0.241671 1.808 S11 Sixth 3.22281 0.364954 1.679 19.2361.996 S12 Lens 2.538835 0.143764 2.320 S13 Seventh 1.445077 0.512191.537 53.955 2.500 S14 Lens 1.27E+00 0.250094 2.738 S15 Filter Infinity0.11 1.5187 64.1664 2.939872 S16 Infinity 0.5978514 2.970893 S17 ImagingInfinity 3.250775 Plane

TABLE 12 K A B C D E F G H J S1 −7.5279 0.0857 −0.105 0.0528 −0.0256−0.0221 0.0379 −0.0166 0.0023 0 S2 −19.893 −0.0142 −0.1337 0.0682 0.0621−0.0783 0.0306 −0.0031 −0.0006 0 S3 −0.0142 −0.0449 −0.0418 −0.01470.1136 0.012 −0.1333 0.0892 −0.0193 0 S4 0 0.0281 −0.189 0.276 −0.0808−0.2297 0.2908 −0.1382 0.024 0 S5 −6.2325 −0.0763 −0.0054 −0.0795 0.6054−1.1875 1.107 −0.5047 0.0912 0 S6 0.4782 −0.115 0.1396 −0.2676 0.5637−0.7991 0.6898 −0.325 0.0682 0 S7 0 −0.0188 −0.0772 0.0717 0.0184 −0.0810.0225 0.0277 −0.0139 0 S8 0 −0.0127 −0.1356 0.0837 0.0781 −0.15020.0847 −0.0163 0 0 S9 −49.08 0.1815 −0.3205 0.2837 −0.2161 0.1317−0.0595 0.0158 −0.0017 0 S10 −5.4303 −0.0205 0.025 −0.1003 0.1046−0.0624 0.0222 −0.0043 0.0003 0 S11 −1.136 0.0314 −0.2615 0.3261 −0.26950.133 −0.0369 0.0053 −0.0003 0 S12 0.0272 −0.1293 0.0241 5E−05 −0.01230.0085 −0.0024 0.0003 −2E−05 0 S13 −0.8 −0.5247 0.2994 −0.1227 0.0414−0.0108 0.002 −0.0002   2E−05 −4E−07 S14 −1.3207 −0.3666 0.2425 −0.12480.0468 −0.0121 0.002 −0.0002   1E−05 −3E−07

Seventh Example

FIG. 13 is a view illustrating a seventh example of an optical imagingsystem, and FIG. 14 illustrates aberration curves of the optical imagingsystem of FIG. 13 .

The seventh example of the optical imaging system includes a first lens710, a second lens 720, a third lens 730, a fourth lens 740, a fifthlens 750, a sixth lens 760, a seventh lens 770, a filter 780, an imagesensor 790, and a stop (not shown) disposed between the first lens 710and the second lens 720.

The first lens 710 has a negative refractive power, a paraxial region ofan object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The second lens 720 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The third lens 730 has a negative refractive power, a paraxial region ofan object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fourth lens 740 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fifth lens 750 has a positive refractive power, a paraxial region ofan object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The sixth lens 760 has a positive refractive power, and a paraxialregion of each of an object-side surface and an image-side surfacethereof is convex.

The seventh lens 770 has a negative refractive power, and a paraxialregion of each of each of an object-side surface and an image-sidesurface thereof is concave.

One inflection point is formed on the object-side surface of the seventhlens 770. In particular, the object-side surface of the seventh lens 770is concave in the paraxial region, and becomes convex toward an edgethereof.

In addition, one inflection point is formed on the image-side surface ofthe seventh lens 770. In particular, the image-side surface of theseventh lens 770 is concave in the paraxial region, and becomes convextoward an edge thereof.

Although not illustrated in FIG. 13 , the stop is disposed at a distanceof 0.383 mm from the object-side surface of the first lens 710 towardthe imaging plane of the optical imaging system. This distance is equalto TTL-SL and can be calculated from the values of TTL and SL forExample 7 listed in Table 57 that appears later in this application.

Table 13 below shows physical properties of the lenses and otherelements of the optical imaging system of FIG. 13 , and Table 14 belowshows aspherical surface coefficients of the lenses of FIG. 13 . Bothsurfaces of all of the lenses of FIG. 13 are aspherical.

TABLE 13 Effective Surface Radius of Thickness/ Index of Abbe ApertureNo. Element Curvature Distance Refraction Number Radius S1 First2.182354 0.332873 1.546 56.114 1.380 S2 Lens 1.943873 0.05 1.369 S3Second 1.685732 0.732159 1.546 56.114 1.335 S4 Lens 28.37273 0.05 1.264S5 Third 7.153573 0.22 1.679 19.236 1.185 S6 Lens 2.922347 0.4264061.050 S7 Fourth 46.9146 0.312126 1.646 23.528 1.112 S8 Lens 17.586010.26165 1.268 S9 Fifth 2.265526 0.27 1.646 23.528 1.774 S10 Lens2.314346 0.373051 1.839 S11 Sixth 8.518581 0.607812 1.546 56.114 2.160S12 Lens −1.98711 0.378187 2.308 S13 Seventh −4.7165 0.36 1.546 56.1142.780 S14 Lens 1.89E+00 0.145735 2.998 S15 Filter Infinity 0.11 1.518764.1664 3.352752 S16 Infinity 0.67 3.384589 S17 Imaging Infinity3.712027 Plane

TABLE 14 K A B C D E F G H S1 −3.5715 0.0005 0.0011 −0.0181 0.00250.0107 −0.0084 0.0026 −0.0003 S2 −9.1496 −0.0513 −0.0055 0.0116 0.0161−0.0207 0.0078 −0.001 0 S3 −2.5622 −0.0879 0.1115 −0.1204 0.1625 −0.13250.0578 −0.0118 0.0006 S4 −90 −0.078 0.2103 −0.4384 0.6397 −0.6153 0.3736−0.1288 0.0189 S5 0 −0.1133 0.2975 −0.5447 0.7496 −0.7199 0.4525 −0.16420.0257 S6 4.6946 −0.0705 0.1434 −0.2144 0.1998 −0.0956 −0.0142 0.0399−0.0137 S7 0 −0.0972 0.1221 −0.3303 0.5457 −0.6222 0.4555 −0.1995 0.0405S8 0 −0.1596 0.2027 −0.3281 0.3412 −0.2472 0.1212 −0.0385 0.0064 S9−18.27 −0.0564 −0.0069 0.0518 −0.0566 0.0228 −0.0011 −0.0019 0.0004 S10−15.127 −0.0603 −0.0145 0.0594 −0.0601 0.0318 −0.0096 0.0015 −1E−04 S110 0.0027 −0.0398 0.025 −0.0137 0.005 −0.001   1E−04 −4E−06 S12 −1.16930.1224 −0.1006 0.0535 −0.0195 0.005 −0.0008   8E−05 −3E−06 S13 −4.4446−0.097 −0.0137 0.0358 −0.0141 0.0028 −0.0003   2E−05 −5E−07 S14 −8.7431−0.0906 0.0342 −0.009 0.0017 −0.0002 2E−05 −1E−06   3E−08

Eighth Example

FIG. 15 is a view illustrating an eighth example of an optical imagingsystem, and FIG. 16 illustrates aberration curves of the optical imagingsystem of FIG. 15 .

The eighth example of the optical imaging system includes a first lens810, a second lens 820, a third lens 830, a fourth lens 840, a fifthlens 850, a sixth lens 860, a seventh lens 870, a filter 880, an imagesensor 890, and a stop (not shown) disposed between the first lens 810and the second lens 820.

The first lens 810 has a negative refractive power, a paraxial region ofan object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The second lens 820 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The third lens 830 has a negative refractive power, a paraxial region ofan object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fourth lens 840 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fifth lens 850 has a positive refractive power, a paraxial region ofan object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The sixth lens 860 has a positive refractive power, and a paraxialregion of each of an object-side surface and an image-side surfacethereof is convex.

The seventh lens 870 has a negative refractive power, and a paraxialregion of each of an object-side surface and an image-side surfacethereof is concave.

One inflection point is formed on the object-side surface of the seventhlens 870. In particular, the object-side surface of the seventh lens 870is concave in the paraxial region, and becomes convex toward an edgethereof.

In addition, one inflection point is formed on the image-side surface ofthe seventh lens 870. In particular, the image-side surface of theseventh lens 870 is concave in the paraxial region, and becomes convextoward an edge thereof.

Although not illustrated in FIG. 15 , the stop is disposed at a distanceof 0.336 mm from the object-side surface of the first lens 810 towardthe imaging plane of the optical imaging system. This distance is equalto TTL-SL and can be calculated from the values of TTL and SL forExample 8 listed in Table 57 that appears later in this application.

Table 15 below shows physical properties of the lenses and otherelements of the optical imaging system of FIG. 15 , and Table 16 belowshows aspherical surface coefficients of the lenses of FIG. 15 . Bothsurfaces of all of the lenses of FIG. 15 are aspherical.

TABLE 15 Effective Surface Radius of Thickness/ Index of Abbe ApertureNo. Element Curvature Distance Refraction Number Radius S1 First2.002076 0.290476 1.546 56.114 1.275 S2 Lens 1.735025 0.046207 1.265 S3Second 1.510849 0.69189 1.546 56.114 1.234 S4 Lens 25.17448 0.0507821.156 S5 Third 6.622812 0.20331 1.679 19.236 1.088 S6 Lens 2.6908820.397038 0.970 S7 Fourth 404.2399 0.304853 1.646 23.528 1.031 S8 Lens26.39909 0.238795 1.192 S9 Fifth 2.030671 0.231034 1.646 23.528 1.495S10 Lens 2.049104 0.337714 1.721 S11 Sixth 9.000096 0.577572 1.54656.114 1.996 S12 Lens −1.67925 0.339723 2.084 S13 Seventh −3.836640.33269 1.546 56.114 2.569 S14 Lens 1.71E+00 0.146102 2.784 S15 FilterInfinity 0.11 1.5187 64.1664 3.104605 S16 Imaging Infinity 0.6032973.133872 S17 Plane Infinity 3.409206

TABLE 16 K A B C D E F G H S1 −3.5658 −0.0001 0.0048 −0.0338 0.00580.0258 −0.024 0.0087 −0.0012 S2 −8.9286 −0.0617 −0.0072 0.019 0.0308−0.0458 0.0196 −0.0029 0 S3 −2.4366 −0.118 0.178 −0.2127 0.3039 −0.26130.1138 −0.0182 −0.0012 S4 100 −0.0932 0.2737 −0.6752 1.2227 −1.4655 1.1−0.4621 0.0813 S5 0 −0.1401 0.3995 −0.8103 1.2941 −1.4787 1.1095 −0.47750.0877 S6 4.6754 −0.0913 0.2084 −0.3503 0.3957 −0.2854 0.067 0.0558−0.0336 S7 0 −0.1191 0.1586 −0.5241 1.0591 −1.4826 1.3333 −0.7155 0.1765S8 0 −0.2012 0.3026 −0.6033 0.8015 −0.7547 0.4799 −0.1903 0.0367 S9−18.968 −0.0705 −0.017 0.0854 −0.095 0.0372 0.0031 −0.007 0.0016 S10−15.615 −0.0761 −0.0114 0.0715 −0.083 0.0509 −0.0182 0.0035 −0.0003 S110 −0.0083 −0.0355 0.0253 −0.0245 0.0145 −0.0045 0.0007 −5E−05 S12−1.1609 0.1552 −0.1513 0.1068 −0.0571 0.0215 −0.005 0.0006 −3E−05 S13−4.7786 −0.1272 −0.0055 0.0492 −0.0232 0.0053 −0.0007   4E−05 −1E−06 S14−8.9618 −0.1184 0.0565 −0.0195 0.0048 −0.0009 1E−04 −6E−06   2E−07

Ninth Example

FIG. 17 is a view illustrating a ninth example of an optical imagingsystem, and FIG. 18 illustrates aberration curves of the optical imagingsystem of FIG. 17 .

The ninth example of the optical imaging system includes a first lens910, a second lens 920, a third lens 930, a fourth lens 940, a fifthlens 950, a sixth lens 960, a seventh lens 970, a filter 980, an imagesensor 990, and a stop (not shown) disposed between the first lens 910and the second lens 920.

The first lens 910 has a negative refractive power, a paraxial region ofan object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The second lens 920 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The third lens 930 has a negative refractive power, a paraxial region ofan object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fourth lens 940 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fifth lens 950 has a positive refractive power, a paraxial region ofan object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The sixth lens 960 has a positive refractive power, and a paraxialregion of each of an object-side surface and an image-side surfacethereof is convex.

The seventh lens 970 has a negative refractive power, and a paraxialregion of each of each of an object-side surface and an image-sidesurface thereof is concave.

One inflection point is formed on the object-side surface of the seventhlens 970. In particular, the object-side surface of the seventh lens 970is concave in the paraxial region, and becomes convex toward an edgethereof.

In addition, one inflection point is formed on the image-side surface ofthe seventh lens 970. In particular, the image-side surface of theseventh lens 970 is concave in the paraxial region, and becomes convextoward an edge thereof.

Although not illustrated in FIG. 17 , the stop is disposed at a distanceof 0.423 mm from the object-side surface of the first lens 910 towardthe imaging plane of the optical imaging system. This distance is equalto TTL-SL and can be calculated from the values of TTL and SL forExample 9 listed in Table 57 that appears later in this application.

Table 17 below shows physical properties of the lenses and otherelements of the optical imaging system of FIG. 17 , and Table 18 belowshows aspherical surface coefficients of the lenses of FIG. 17 . Bothsurfaces of all of the lenses of FIG. 17 are aspherical.

TABLE 17 Effective Surface Radius of Thickness/ Index of Abbe ApertureNo. Element Curvature Distance Refraction Number Radius S1 First2.368882 0.367771 1.546 56.114 1.537 S2 Lens 2.149833 0.055693 1.509 S3Second 1.901715 0.8054 1.546 56.114 1.470 S4 Lens 34.69271 0.0556931.395 S5 Third 8.116881 0.245048 1.679 19.236 1.315 S6 Lens 3.2497050.44958 1.170 S7 Fourth 27.77257 0.345117 1.646 23.528 1.242 S8 Lens15.68604 0.292205 1.430 S9 Fifth 2.481018 0.30074 1.646 23.528 1.793 S10Lens 2.530918 0.421042 2.058 S11 Sixth 8.852122 0.594719 1.546 56.1142.406 S12 Lens −2.33268 0.433709 2.591 S13 Seventh −5.6504 0.4009871.546 56.114 3.097 S14 Lens 2.11E+00 0.196308 3.252 S15 Filter Infinity0.11 1.5187 64.1664 3.633461 S16 Infinity 0.713029 3.664237 S17 ImagingInfinity 4.005175 Plane

TABLE 18 K A B C D E F G H S1 −3.6056 0.0006 0.0002 −0.0091 0.00080.0037 −0.0023 0.0006 −6E−05 S2 −9.0241 −0.0381 −0.0034 0.0057 0.0064−0.0066 0.0021 −0.0002 0 S3 −2.5303 −0.0646 0.0638 −0.0489 0.0502−0.0297 0.0079 −0.0003 −0.0002 S4 −90 −0.061 0.1445 −0.2496 0.2927−0.227 0.1117 −0.0313 0.0037 S5 0 −0.0873 0.1992 −0.3055 0.3359 −0.25380.1258 −0.0363 0.0045 S6 4.7161 −0.0546 0.0965 −0.1239 0.0985 −0.04150.0003 0.0073 −0.0021 S7 0 −0.0683 0.0579 −0.1095 0.1139 −0.0757 0.0284−0.0061 0.0009 S8 0 −0.1131 0.1074 −0.1248 0.0808 −0.0284 0.0031 0.0006−1E−05 S9 −17.253 −0.0425 −0.0026 0.0281 −0.0272 0.0102 −0.0011 −0.0003  7E−05 S10 −15.241 −0.0436 −0.0118 0.0343 −0.0279 0.0119 −0.0029 0.0004−2E−05 S11 0 0.0034 −0.0267 0.0138 −0.0061 0.0018 −0.0003   2E−05 −8E−07S12 −1.2097 0.0895 −0.0603 0.0269 −0.0083 0.0018 −0.0003   2E−05 −7E−07S13 −4.5375 −0.0806 0.0002 0.0144 −0.005 0.0008 −8E−05   4E−06 −8E−08S14 −9.2133 −0.0675 0.0218 −0.005 0.0008 −1E−04   8E−06 −4E−07   7E−09

Tenth Example

FIG. 19 is a view illustrating a tenth example of an optical imagingsystem, and FIG. 20 illustrates aberration curves of the optical imagingsystem of FIG. 19 .

The tenth example of the optical imaging system includes a first lens1010, a second lens 1020, a third lens 1030, a fourth lens 1040, a fifthlens 1050, a sixth lens 1060, a seventh lens 1070, a filter 1080, animage sensor 1090, and a stop (not shown) disposed between the firstlens 1010 and the second lens 1020.

The first lens 1010 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The second lens 1020 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The third lens 1030 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fourth lens 1040 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fifth lens 1050 has a negative refractive power, a paraxial regionof an object-side surface thereof is concave, and a paraxial region ofan image-side surface thereof is convex.

The sixth lens 1060 has a positive refractive power, and a paraxialregion of each of an object-side surface and an image-side surfacethereof is convex.

The seventh lens 1070 has a negative refractive power, and a paraxialregion of each of an object-side surface and an image-side surfacethereof is concave.

One inflection point is formed on the object-side surface of the seventhlens 1070. In particular, the object-side surface of the seventh lens1070 is concave in the paraxial region, and becomes convex toward anedge thereof.

In addition, one inflection point is formed on the image-side surface ofthe seventh lens 1070. In particular, the image-side surface of theseventh lens 1070 is concave in the paraxial region, and becomes convextoward an edge thereof.

Although not illustrated in FIG. 19 , the stop is disposed at a distanceof 0.731 mm from the object-side surface of the first lens 1010 towardthe imaging plane of the optical imaging system. This distance is equalto TTL-SL and can be calculated from the values of TTL and SL forExample 10 listed in Table 57 that appears later in this application.

Table 19 below shows physical properties of the lenses and otherelements of the optical imaging system of FIG. 19 , and Table 20 belowshows aspherical surface coefficients of the lenses of FIG. 19 . Bothsurfaces of all of the lenses of FIG. 19 are aspherical.

TABLE 19 Effective Surface Radius of Thickness/ Index of Abbe ApertureNo. Element Curvature Distance Refraction Number Radius S1 First1.732331 0.731243 1.546 56.114 1.250 S2 Lens 12.53699 0.070023 1.181 S3Second 5.589296 0.2 1.667 20.353 1.147 S4 Lens 2.573966 0.39715 1.100 S5Third 8.065523 0.384736 1.546 56.114 1.128 S6 Lens 7.836681 0.1925911.247 S7 Fourth 6.687158 0.244226 1.546 56.114 1.276 S8 Lens 30.328470.271297 1.374 S9 Fifth −3.28742 0.24968 1.667 20.353 1.481 S10 Lens−4.51593 0.138845 1.734 S11 Sixth 5.679879 0.519865 1.546 56.114 2.150S12 Lens −1.89003 0.316634 2.318 S13 Seventh −3.93255 0.3 1.546 56.1142.640 S14 Lens 1.741826 0.193709 2.747 S15 Filter Infinity 0.11 1.51864.166 3.146 S16 Infinity 0.78 3.177045639 S17 Imaging Infinity3.536356437 Plane

TABLE 20 K A B C D S1 −0.7464 0.01386 0.03443 −0.0749 0.10292 S2 36.6688−0.0823 0.19496 −0.3067 0.36336 S3 −1.3559 −0.1603 0.33047 −0.40590.33245 S4 −0.4109 −0.0907 0.14443 0.1155 −0.7969 S5 0 −0.0739 0.04629−0.1203 0.11651 S6 0 −0.0932 0.00341 0.05212 −0.1827 S7 25.1476 −0.1235−0.1887 0.37626 −0.554 S8 −99 −9E−05 −0.3274 0.35885 −0.3195 S9 −70.8940.02055 0.04825 −0.5284 0.75832 S10 2.28319 0.17594 −0.3448 0.22829−0.0716 S11 −99 0.11875 −0.2169 0.16747 −0.0871 S12 −3.3067 0.16436−0.1849 0.1159 −0.049 S13 −2.4772 −0.1026 −0.0482 0.07401 −0.0308 S14−1.1028 −0.2935 0.20325 −0.1127 0.04574 E F G H J S1 −0.0706 0.017270.00423 −0.0023 0 S2 −0.323 0.19024 −0.0632 0.00855 0 S3 −0.1787 0.06728−0.0166 0.00178 0 S4 1.50089 −1.4406 0.72187 −0.147 0 S5 −0.0578 −0.00890.02328 −0.0057 0 S6 0.24566 −0.2173 0.11261 −0.0241 0 S7 0.67306−0.5796 0.27819 −0.0538 0 S8 0.34506 −0.2608 0.09954 −0.0144 0 S9−0.4915 0.16359 −0.0271 0.00175 0 S10 0.01095 −0.0007  −4E−06 1.4E−06 0S11 0.02755 −0.0049 0.00045  −2E−05 0 S12 0.01383 −0.0024 0.00023 −9E−06 0 S13 0.00666 −0.0008 5.5E−05  −2E−06 0 S14 −0.0129 0.0024−0.0003 1.8E−05 −5E−07

Eleventh Example

FIG. 21 is a view illustrating an eleventh example of an optical imagingsystem, and FIG. 22 illustrates aberration curves of the optical imagingsystem of FIG. 21 .

The eleventh example of the optical imaging system includes a first lens1110, a second lens 1120, a third lens 1130, a fourth lens 1140, a fifthlens 1150, a sixth lens 1160, a seventh lens 1170, a filter 1180, animage sensor 1190, and a stop (not shown) disposed between the firstlens 1110 and the second lens 1120.

The first lens 1110 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The second lens 1120 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The third lens 1130 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fourth lens 1140 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fifth lens 1150 has a negative refractive power, a paraxial regionof an object-side surface thereof is concave, and a paraxial region ofan image-side surface thereof is convex.

The sixth lens 1160 has a positive refractive power, and a paraxialregion of each of an object-side surface and an image-side surfacethereof is convex.

The seventh lens 1170 has a negative refractive power, and a paraxialregion of each of an object-side surface and a paraxial region of animage-side surface thereof is concave.

One inflection point is formed on the object-side surface of the seventhlens 1170. In particular, the object-side surface of the seventh lens1170 is concave in the paraxial region, and becomes convex toward anedge thereof.

In addition, one inflection point is formed on the image-side surface ofthe seventh lens 1170. In particular, the image-side surface of theseventh lens 1170 is concave in the paraxial region, and becomes convextoward an edge thereof.

Although not illustrated in FIG. 21 , the stop is disposed at a distanceof 0.731 mm from the object-side surface of the first lens 1110 towardthe imaging plane of the optical imaging system. This distance is equalto TTL-SL and can be calculated from the values of TTL and SL forExample 11 listed in Table 57 that appears later in this application.

Table 21 below shows physical properties of the lenses and otherelements of the optical imaging system of FIG. 21 , and Table 22 belowshows aspherical surface coefficients of the lenses of FIG. 21 . Bothsurfaces of all of the lenses of FIG. 21 are aspherical.

TABLE 21 Effective Surface Radius of Thickness/ Index of Abbe ApertureNo. Element Curvature Distance Refraction Number Radius S1 First1.770763 0.730711 1.546 56.114 1.320 S2 Lens 14.17202 0.100163 1.273 S3Second 5.668898 0.18 1.667 20.353 1.211 S4 Lens 2.64742 0.372112 1.100S5 Third 8.43642 0.362306 1.546 56.114 1.132 S6 Lens 7.970624 0.2290991.239 S7 Fourth 6.86515 0.42272 1.546 56.114 1.274 S8 Lens 36.769210.245464 1.393 S9 Fifth −3.17407 0.478139 1.667 20.353 1.445 S10 Lens−4.17541 0.041087 1.772 S11 Sixth 7.099919 0.552516 1.546 56.114 2.150S12 Lens −1.53067 0.261423 2.068 S13 Seventh −2.51307 0.3 1.546 56.1142.414 S14 Lens 1.797456 0.23426 2.679 S15 Filter Infinity 0.11 1.51864.166 2.907 S16 Infinity 0.7799997 2.935720549 S17 Imaging Infinity3.264729521 Plane

TABLE 22 K A B C D S1 −0.7681 0.01965 −0.0023 0.03216 −0.0725 S2 45.8003−0.0479 0.07745 −0.054 −0.0476 S3 −2.8609 −0.1305 0.23846 −0.29080.23698 S4 −0.8781 −0.0856 0.15126 −0.0468 −0.2774 S5 0 −0.0618 −0.01570.07733 −0.2544 S6 0 −0.0948 −0.0485 0.1701 −0.3674 S7 24.7714 −0.1253−0.0916 0.07902 0.06606 S8 −99 −0.022 −0.2346 0.17869 −0.0276 S9 −49.881−0.0321 0.01104 −0.3632 0.63755 S10 1.50394 0.14944 −0.3234 0.26404−0.1034 S11 −99 0.05255 −0.154 0.1443 −0.0834 S12 −2.9382 0.0764 −0.05670.02305 −0.0064 S13 −5.8244 −0.0197 −0.1042 0.09438 −0.036 S14 −0.9447−0.2204 0.12723 −0.0644 0.02544 E F G H J S1 0.09393 −0.0692 0.02709−0.0045 0 S2 0.13354 −0.1194 0.05034 −0.0084 0 S3 −0.1031 0.0108 0.00969−0.003 0 S4 0.65417 −0.6619 0.33681 −0.0673 0 S5 0.39332 −0.3533 0.18049−0.0399 0 S6 0.41646 −0.2753 0.10654 −0.0195 0 S7 −0.3032 0.34529−0.1688 0.03094 0 S8 −0.0274 0.02137 −0.0097 0.00223 0 S9 −0.478 0.17949−0.0322 0.002 0 S10 0.01233 0.00452 −0.0017 0.00016 0 S11 0.02708−0.0048 0.00044  −2E−05 0 S12 0.0012 −0.0001 8.7E−06  −2E−07 0 S130.00755 −0.0009   6E−05  −2E−06 0 S14 −0.0072 0.00137 −0.0002 1.1E−05−3E−07

Twelfth Example

FIG. 23 is a view illustrating a twelfth example of an optical imagingsystem, and FIG. 24 illustrates aberration curves of the optical imagingsystem of FIG. 23 .

The twelfth example of the optical imaging system includes a first lens1210, a second lens 1220, a third lens 1230, a fourth lens 1240, a fifthlens 1250, a sixth lens 1260, a seventh lens 1270, a filter 1280, animage sensor 1290, and a stop (not shown) disposed between the firstlens 1210 and the second lens 1220.

The first lens 1210 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The second lens 1220 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The third lens 1230 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fourth lens 1240 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fifth lens 1250 has a negative refractive power, a paraxial regionof an object-side surface thereof is concave, and a paraxial region ofan image-side surface thereof is convex.

The sixth lens 1260 has a positive refractive power, and a paraxialregion of each of an object-side surface and an image-side surfacethereof is convex.

The seventh lens 1270 has a negative refractive power, and a paraxialregion of each of an object-side surface and an image-side surfacethereof is concave.

One inflection point is formed on the object-side surface of the seventhlens 1270. In particular, the object-side surface of the seventh lens1270 is concave in the paraxial region, and becomes convex toward anedge thereof.

In addition, one inflection point is formed on the image-side surface ofthe seventh lens 1270. In particular, the image-side surface of theseventh lens 1270 is concave in the paraxial region, and becomes convextoward an edge thereof.

Although not illustrated in FIG. 23 , the stop is disposed at a distanceof 0.727 mm from the object-side surface of the first lens 1210 towardthe imaging plane of the optical imaging system. This distance is equalto TTL-SL and can be calculated from the values of TTL and SL forExample 12 listed in Table 57 that appears later in this application.

Table 23 below shows physical properties of the lenses and otherelements of the optical imaging system of FIG. 23 , and Table 24 belowshows aspherical surface coefficients of the lenses of FIG. 23 . Bothsurfaces of all of the lenses of FIG. 23 are aspherical.

TABLE 23 Effective Surface Radius of Thickness/ Index of Abbe ApertureNo. Element Curvature Distance Refraction Number Radius S1 First1.725845 0.726326 1.546 56.114 1.310 S2 Lens 12.83315 0.055329 1.274 S3Second 5.358298 0.181707 1.667 20.353 1.218 S4 Lens 2.541322 0.4017911.100 S5 Third 8.435541 0.408349 1.546 56.114 1.131 S6 Lens 7.8745570.186858 1.245 S7 Fourth 6.705131 0.298547 1.546 56.114 1.272 S8 Lens27.19617 0.256118 1.379 S9 Fifth −3.28751 0.241636 1.667 20.353 1.449S10 Lens −4.34069 0.090002 1.647 S11 Sixth 5.401728 0.493563 1.54656.114 2.150 S12 Lens −1.72062 0.282074 2.138 S13 Seventh −3.995940.300688 1.546 56.114 2.363 S14 Lens 1.586532 0.212709 2.585 S15 FilterInfinity 0.11 1.518 64.166 2.904 S16 Infinity 0.78 2.93204801 S17Imaging Infinity 3.282195737 Plane

TABLE 24 K A B C D S1 −0.7633 0.01527 0.01019 0.0604 −0.2258 S2 36.2518−0.0857 0.28623 −0.6478 0.9663 S3 −2.2692 −0.1619 0.40214 −0.70240.86766 S4 −0.5501 −0.0782 0.07842 0.32154 −1.2153 S5 0 −0.0637 0.03982−0.1864 0.37638 S6 0 −0.099 0.02 0.02036 −0.1635 S7 25.107 −0.1211−0.2111 0.49819 −0.7382 S8 −99 0.00624 −0.3995 0.51975 −0.4722 S9−69.265 0.08083 −0.1563 −0.2824 0.61355 S10 3.04238 0.24647 −0.50890.39539 −0.1641 S11 −99 0.12569 −0.2316 0.18601 −0.0999 S12 −3.6630.14498 −0.1575 0.09504 −0.0383 S13 −2.6499 −0.0877 −0.0968 0.12134−0.0535 S14 −1.0624 −0.3185 0.22606 −0.1296 0.05544 E F G H J S1 0.35306−0.2845 0.11676 −0.0196 0 S2 −0.9184 0.52698 −0.1654 0.02147 0 S3−0.7104 0.37031 −0.1094 0.01364 0 S4 1.98953 −1.7497 0.81604 −0.1565 0S5 −0.5082 0.40475 −0.1698 0.02998 0 S6 0.24341 −0.2157 0.1109 −0.0238 0S7 0.7709 −0.5844 0.26919 −0.0523 0 S8 0.40416 −0.2607 0.09371 −0.0133 0S9 −0.4491 0.15873 −0.0272 0.00181 0 S10 0.04036 −0.006 0.00051  −2E−050 S11 0.03252 −0.0059 0.00056  −2E−05 0 S12 0.01029 −0.0017 0.00015 −6E−06 0 S13 0.01276 −0.0017 0.00013  −4E−06 0 S14 −0.0167 0.00337−0.0004 3.1E−05 −1E−06

Thirteenth Example

FIG. 25 is a view illustrating a thirteenth example of an opticalimaging system, and FIG. 26 illustrates aberration curves of the opticalimaging system of FIG. 25 .

The thirteenth example of the optical imaging system includes a firstlens 1310, a second lens 1320, a third lens 1330, a fourth lens 1340, afifth lens 1350, a sixth lens 1360, a seventh lens 1370, a filter 1380,an image sensor 1390, and a stop (not shown) disposed between the secondlens 1320 and the third lens 1330.

The first lens 1310 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The second lens 1320 has a positive refractive power, and a paraxialregion of each of an object-side surface and an image-side surfacethereof is convex.

The third lens 1330 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fourth lens 1340 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fifth lens 1350 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The sixth lens 1360 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The seventh lens 1370 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

Two inflection points are formed on the object-side surface of theseventh lens 1370. In particular, the object-side surface of the seventhlens 1370 is convex in the paraxial region, becomes concave in a regionoutside the paraxial region, and becomes convex toward an edge thereof.

One inflection point is formed on the image-side surface of the seventhlens 1370. In particular, the image-side surface of the seventh lens1370 is concave in the paraxial region, and becomes convex toward anedge thereof.

Although not illustrated in FIG. 25 , the stop is disposed at a distanceof 1.158 mm from the object-side surface of the first lens 1310 towardthe imaging plane of the optical imaging system. This distance is equalto TTL-SL and can be calculated from the values of TTL and SL forExample 13 listed in Table 57 that appears later in this application.

Table 25 below shows physical properties of the lenses and otherelements of the optical imaging system of FIG. 25 , and Table 26 belowshows aspherical surface coefficients of the lenses of FIG. 25 . Bothsurfaces of all of the lenses of FIG. 25 are aspherical.

TABLE 25 Sur- Effective face Radius of Thickness/ Index of Abbe ApertureNo. Element Curvature Distance Refraction Number Radius S1 First 2.1410.481 1.546 56.114 1.450 S2 Lens 3.251 0.110 1.350 S3 Second 3.253 0.5421.546 56.114 1.285 S4 Lens −15.773 0.025 1.232 S5 Third 8.425 0.2301.679 19.236 1.157 S6 Lens 3.514 0.625 1.095 S7 Fourth 25.986 0.2961.679 19.236 1.265 S8 Lens 15.894 0.230 1.452 S9 Fifth 3.048 0.400 1.54656.114 1.675 S10 Lens 3.616 0.290 2.092 S11 Sixth 3.762 0.400 1.67919.236 2.153 S12 Lens 2.792 0.204 2.476 S13 Seventh 1.614 0.510 1.53753.955 2.938 S14 Lens 1.326 0.196 3.102 S15 Filter Infinity 0.110 1.51864.197 3.420 S16 Infinity 0.65  3.450 S17 Imaging Infinity 3.730 Plane

TABLE 26 K A B C D S1 −8.038 0.07067 −0.0797 0.03339 0.00722 S2 −20.594−0.0019 −0.1494 0.20409 −0.2922 S3 −0.0908 −0.0339 −0.0641 0.13679−0.2821 S4 −0.4822 −0.0436 0.17605 −0.3256 0.19989 S5 −1.1841 −0.10730.25445 −0.4683 0.49912 S6 0.87331 −0.0693 0.03569 0.20478 −0.8833 S7−0.4999 −0.0314 0.01347 −0.2894 0.97164 S8 −1E−06 −0.0273 −0.11770.21199 −0.2544 S9 −41.843 0.16235 −0.3487 0.40163 −0.3105 S10 −5.14240.03971 −0.1364 0.15688 −0.1229 S11 −2.1666 0.03558 −0.1809 0.19853−0.1438 S12 −0.0207 −0.1043 0.02386 −0.0063 −0.0007 S13 −0.7948 −0.41280.18634 −0.0516 0.01005 S14 −1.3226 −0.3105 0.17125 −0.0712 0.02129 E FG H J S1 −0.0491 0.04654 −0.0186 0.00318 −0.0002 S2 0.37549 −0.30850.14861 −0.0387 0.0042 S3 0.49215 −0.4815 0.26054 −0.0746 0.00881 S40.1916 −0.4291 0.32034 −0.1141 0.01622 S5 −0.2863 0.05651 0.03245−0.0229 0.00442 S6 1.73278 −1.9742 1.34645 −0.5106 0.08302 S7 −1.71811.79234 −1.1152 0.38365 −0.0563 S8 0.21565 −0.1264 0.04694 −0.00930.0007 S9 0.13962 −0.027 −0.0038 0.00264 −0.0003 S10 0.06333 −0.02120.0044 −0.0005 2.6E−05 S11 0.06411 −0.0173 0.00275 −0.0002   9E−06 S120.00066 −3E−06 −4E−05 7.3E−06  −4E−07 S13 −0.0015 0.00016 −1E−05 6.2E−07 −1E−08 S14 −0.0043 0.00058 −5E−05 2.3E−06  −5E−08

Fourteenth Example

FIG. 27 is a view illustrating a fourteenth example of an opticalimaging system, and FIG. 28 illustrates aberration curves of the opticalimaging system of FIG. 27 .

The fourteenth optical imaging system includes a first lens 1410, asecond lens 1420, a third lens 1430, a fourth lens 1440, a fifth lens1450, a sixth lens 1460, a seventh lens 1470, a filter 1480, an imagesensor 1490, and a stop (not shown) disposed between the second lens1420 and the third lens 1430.

The first lens 1410 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The second lens 1420 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The third lens 1430 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fourth lens 1440 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fifth lens 1450 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The sixth lens 1460 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The seventh lens 1470 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

One inflection point is formed on the object-side surface of the seventhlens 1470. In particular, the object-side surface of the seventh lens1470 is convex in the paraxial region, and becomes concave toward anedge thereof.

In addition, one inflection point is formed on the image-side surface ofthe seventh lens 1470. In particular, the image-side surface of theseventh lens 1470 is concave in the paraxial region, and becomes convextoward an edge thereof.

Although not illustrated in FIG. 27 , the stop is disposed at a distanceof 1.080 mm from the object-side surface of the first lens 1410 towardthe imaging plane of the optical imaging system. This distance is equalto TTL-SL and can be calculated from the values of TTL and SL forExample 14 listed in Table 57 that appears later in this application.

Table 27 below shows physical properties of the lenses and otherelements of the optical imaging system of FIG. 27 , and Table 28 belowshows aspherical surface coefficients of the lenses of FIG. 27 . Bothsurfaces of all of the lenses of FIG. 27 are aspherical.

TABLE 27 Effective Surface Radius of Thickness/ Index of Abbe ApertureNo. Element Curvature Distance Refraction Number Radius S1 First2.136724381 0.486053 1.546 56.114 1.360 S2 Lens 2.889766837 0.0875721.331 S3 Second 3.197028762 0.481363 1.546 56.114 1.301 S4 Lens109.2678078 0.025 1.264 S5 Third 8.21648334 0.333222 1.679 19.236 1.218S6 Lens 3.643026543 0.428709 1.229 S7 Fourth 5.149363024 0.374385 1.54656.114 1.353 S8 Lens 7.983541153 0.393693 1.392 S9 Fifth 3.813432353 0.41.546 56.114 1.576 S10 Lens 4.85043033 0.288816 2.010 S11 Sixth3.891285923 0.4 1.546 56.114 1.916 S12 Lens 3.082484661 0.229858 2.371S13 Seventh 1.601117752 0.493312 1.546 56.114 2.526 S14 Lens 1.2142471590.218016 2.787 S15 Filter Infinity 0.21 1.518 64.197 3.238 S16 Infinity0.649932 3.316 S17 Imaging Infinity 3.728 Plane

TABLE 28 K A B C D S1 −1 −0.0136 0.02467 −0.0811 0.09254 S2 −13.2220.01839 −0.091 −0.0856 0.30551 S3 −1.2237 −0.0255 0.01296 −0.29940.64916 S4 −7.0515 −0.018 0.09424 −0.4684 1.19648 S5 8.98852 −0.06060.14701 −0.5476 1.41458 S6 1.65557 −0.053 0.06637 −0.1724 0.48815 S7−4.3409 −0.0524 −0.0067 0.12439 −0.3711 S8 5.85886 −0.0866 0.12995−0.4361 0.91566 S9 −43.521 0.08526 −0.1755 0.22567 −0.2234 S10 −3.10470.0435 −0.1427 0.1592 −0.1109 S11 −16.199 0.12636 −0.2435 0.25714−0.2182 S12 0.17584 −0.0767 0.07339 −0.0745 0.03369 S13 −0.8173 −0.42720.20439 −0.0489 0.00204 S14 −1.397 −0.3515 0.23363 −0.1198 0.04471 E F GH J S1 −0.0456 −0.0139 0.02747 −0.0118 0.0017 S2 −0.3421 0.22925 −0.09760.02376 −0.0025 S3 −0.662 0.40893 −0.1567 0.03316 −0.0029 S4 −1.77851.59837 −0.8543 0.24924 −0.0305 S5 −2.2793 2.23564 −1.2976 0.41058−0.0546 S6 −0.9461 1.10918 −0.7563 0.27857 −0.0429 S7 0.55033 −0.47010.22801 −0.0561 0.0052 S8 −1.2163 1.00858 −0.506 0.14047 −0.0165 S90.15386 −0.0732 0.02213 −0.0038 0.00029 S10 0.05004 −0.0153 0.00308−0.0004 1.9E−05 S11 0.11759 −0.0381 0.00724 −0.0007 3.2E−05 S12 −0.0080.00106  −7E−05 2.3E−06  −1E−08 S13 0.00211 −0.0006 8.5E−05  −6E−061.6E−07 S14 −0.0113 0.00187 −0.0002 1.1E−05  −3E−07

Fifteenth Example

FIG. 29 is a view illustrating a fifteenth example of an optical imagingsystem, and FIG. 30 illustrates aberration curves of the optical imagingsystem of FIG. 29 .

The fifteenth example of the optical imaging system includes a firstlens 1510, a second lens 1520, a third lens 1530, a fourth lens 1540, afifth lens 1550, a sixth lens 1560, a seventh lens 1570, a filter 1580,an image sensor 1590, and a stop (not shown) disposed between the secondlens 1520 and the third lens 1530.

The first lens 1510 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The second lens 1520 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The third lens 1530 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fourth lens 1540 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fifth lens 1550 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The sixth lens 1560 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The seventh lens 1570 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

One inflection point is formed on the object-side surface of the seventhlens 1570. In particular, the object-side surface of the seventh lens1570 is convex in the paraxial region, and becomes concave toward anedge thereof.

In addition, one inflection point is formed on the image-side surface ofthe seventh lens 1570. In particular, the image-side surface of theseventh lens 1570 is concave in the paraxial region, and becomes convextoward an edge thereof.

Although not illustrated in FIG. 29 , the stop is disposed at a distanceof 1.178 mm from the object-side surface of the first lens 1510 towardthe imaging plane of the optical imaging system. This distance is equalto TTL-SL and can be calculated from the values of TTL and SL forExample 15 listed in Table 57 that appears later in this application.

Table 29 below shows physical properties of the lenses and otherelements of the optical imaging system of FIG. 29 , and Table 30 belowshows aspherical surface coefficients of the lenses of FIG. 29 . Bothsurfaces of all of the lenses of FIG. 29 are aspherical.

TABLE 29 Effective Surface Radius of Thickness/ Index of Abbe ApertureNo. Element Curvature Distance Refraction Number Radius S1 First2.367386627 0.52496 1.546 56.114 1.449 S2 Lens 3.194732034 0.05968 1.420S3 Second 3.420339572 0.567044 1.546 56.114 1.396 S4 Lens 70.973752140.026546 1.328 S5 Third 7.778333323 0.350469 1.679 19.236 1.286 S6 Lens3.816229093 0.409426 1.313 S7 Fourth 5.591688642 0.369187 1.546 56.1141.426 S8 Lens 7.993916661 0.39653 1.495 S9 Fifth 4.100335907 0.4260031.546 56.114 1.707 S10 Lens 5.37283934 0.303377 1.986 S11 Sixth4.360928988 0.424063 1.679 19.236 1.999 S12 Lens 3.568454408 0.2234562.401 S13 Seventh 1.78787121 0.541352 1.546 56.114 2.495 S14 Lens1.397505481 0.200463 2.837 S15 Filter Infinity 0.21 1.518 64.197 3.186S16 Infinity 0.832254 3.255759682 S17 Imaging Infinity 3.785091526 Plane

TABLE 30 K A B C D S1 −1 −0.006 −0.0037 −0.012 0.01197 S2 −13.1010.01484 −0.0546 −0.0452 0.12694 S3 −1.2472 −0.0205 0.01627 −0.14880.25175 S4 −7.0515 −0.0205 0.10486 −0.3805 0.75149 S5 8.9156 −0.0324−0.0045 0.06384 −0.1003 S6 1.66379 −0.0267 −0.1125 0.59826 −1.3543 S7−4.619 −0.0378 −0.0049 0.06442 −0.1511 S8 5.61159 −0.0667 0.14302−0.4869 0.93128 S9 −44.124 0.05707 −0.0758 0.04539 −0.0145 S10 −4.98130.03529 −0.0999 0.10243 −0.0647 S11 −15.42 0.09903 −0.1649 0.14824−0.1003 S12 0.17905 −0.0585 0.05308 −0.0451 0.01769 S13 −0.825 −0.3030.11661 −0.0228 0.00114 S14 −1.3872 −0.2937 0.18771 −0.0863 0.0269 E F GH J S1 0.01356 −0.0351 0.02669 −0.009 0.00115 S2 −0.1111 0.05601 −0.01750.00311 −0.0002 S3 −0.2171 0.12177 −0.045 0.00972 −0.0009 S4 −0.87920.62566 −0.2656 0.06174 −0.006 S5 0.05665 0.00724 −0.0234 0.01032−0.0015 S6 1.7261 −1.3193 0.59994 −0.1494 0.01566 S7 0.17871 −0.12250.04791 −0.0096 0.00073 S8 −1.0571 0.72412 −0.2938 0.06506 −0.006 S90.00087 5.3E−05 0.00022 −8E−05 9.1E−06 S10 0.02598 −0.0068 0.0011−0.0001   4E−06 S11 0.04259 −0.0109 0.00165 −0.0001 4.7E−06 S12 −0.00380.00049  −4E−05 1.5E−06  −3E−08 S13 0.00047 −0.0001 1.2E−05  −7E−071.5E−08 S14 −0.0055 0.00073  −6E−05 2.7E−06  −5E−08

Sixteenth Example

FIG. 31 is a view illustrating a sixteenth example of an optical imagingsystem, and FIG. 32 illustrates aberration curves of the optical imagingsystem of FIG. 31 .

The sixteenth example of the optical imaging system includes a firstlens 1610, a second lens 1620, a third lens 1630, a fourth lens 1640, afifth lens 1650, a sixth lens 1660, a seventh lens 1670, a filter 1680,an image sensor 1690, and a stop (not shown) disposed in front of thefirst lens 1610.

The first lens 1610 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The second lens 1620 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The third lens 1630 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fourth lens 1640 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fifth lens 1650 has a negative refractive power, a paraxial regionof an object-side surface thereof is concave, and a paraxial region ofan image-side surface thereof is convex.

The sixth lens 1660 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The seventh lens 1670 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

One inflection point is formed on the object-side surface of the seventhlens 1670. In particular, the object-side surface of the seventh lens1670 is convex in the paraxial region, and becomes concave toward anedge thereof.

In addition, one inflection point is formed on the image-side surface ofthe seventh lens 1670. In particular, the image-side surface of theseventh lens 1670 is concave in the paraxial region, and becomes convextoward an edge thereof.

Although not illustrated in FIG. 31 , the stop is disposed at a distanceof 0.250 mm from the object-side surface of the first lens 1610 towardthe imaging plane of the optical imaging system. This distance is equalto TTL-SL and can be calculated from the values of TTL and SL forExample 16 listed in Table 57 that appears later in this application.

Table 31 below shows physical properties of the lenses and otherelements of the optical imaging system of FIG. 31 , and Table 32 belowshows aspherical surface coefficients of the lenses of FIG. 31 . Bothsurfaces of all of the lenses of FIG. 31 are aspherical.

TABLE 31 Effective Surface Radius of Thickness/ Index of Abbe ApertureNo. Element Curvature Distance Refraction Number Radius S1 First1.721083 0.634874 1.5441 56.1138 1.100 S2 Lens 11.45706 0.121172 1.071S3 Second 119.1721 0.203286 1.6612 20.3532 1.057 S4 Lens 4.4757870.084345 1.043 S5 Third 4.525763 0.310946 1.5441 56.1138 1.051 S6 Lens20.60825 0.215768 1.015 S7 Fourth 13.21519 0.236935 1.5441 56.1138 1.019S8 Lens 16.27332 0.210349 1.070 S9 Fifth −6.57315 0.41188 1.651 21.49421.076 S10 Lens −10.4553 0.371031 1.320 S11 Sixth 3.477886 0.6317751.5441 56.1138 1.556 S12 Lens 3.199354 0.267164 2.337 S13 Seventh2.880384 0.505977 1.5441 56.1138 2.489 S14 Lens 1.71E+00 0.138438 2.666S15 Filter Infinity 0.21 1.5182 64.1973 3.102058013 S16 Infinity 0.593.177033741 S17 Imaging Infinity 3.529142415 Plane

TABLE 32 K A B C D E F G H S1 0.0432 −0.0088 0.0131 −0.0627 0.1199−0.1345 0.077 −0.018 −0.0004 S2 −26.097 −0.0562 0.051 −0.0514 0.0595−0.0683 0.0462 −0.0139 −7E−05 S3 −99 −0.1283 0.1953 −0.2779 0.5135−0.8812 0.9662 −0.5723 0.1395 S4 −16.567 −0.0971 0.1552 −0.3608 0.985−2.059 2.5647 −1.6683 0.4378 S5 −1.6774 −0.0377 0.065 −0.4515 1.687−3.5163 4.2391 −2.6607 0.6752 S6 57.913 −0.0559 0.0533 −0.341 1.3373−2.8539 3.4811 −2.2114 0.5781 S7 −66.305 −0.1749 −0.0635 0.0963 −0.20610.5819 −0.9 0.6874 −0.1979 S8 19.549 −0.1228 −0.0686 0.0207 0.1647−0.2695 0.1725 −0.0616 0.0161 S9 29.709 −0.0709 0.0826 −0.3062 0.6009−0.6459 0.3344 −0.0761 0 S10 −31.338 −0.1255 0.1076 −0.1494 0.1908−0.1423 0.0506 −0.0065 0 S11 −46.453 0.0038 −0.1455 0.1534 −0.126 0.0705−0.0225 0.0029 0 S12 −31.504 0.0093 −0.0326 0.0149 −0.0033 0.0003 −1E−05−7E−07 0 S13 −0.5233 −0.2947 0.1709 −0.0627 0.0154 −0.0025 0.0003 −1E−05 3E−07 S14 −0.8257 −0.2584 0.1353 −0.0565 0.0166 −0.0032 0.0004 −3E−05 7E−07

Seventeenth Example

FIG. 33 is a view illustrating a seventeenth example of an opticalimaging system, and FIG. 34 illustrates aberration curves of the opticalimaging system of FIG. 33 .

The seventeenth example of the optical imaging system includes a firstlens 1710, a second lens 1720, a third lens 1730, a fourth lens 1740, afifth lens 1750, a sixth lens 1760, a seventh lens 1770, a filter 1780,an image sensor 1790, and a stop (not shown) disposed between the firstlens 1710 and the second lens 1720.

The first lens 1710 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The second lens 1720 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The third lens 1730 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fourth lens 1740 has a positive refractive power, and a paraxialregion of each of an object-side surface and an image-side surfacethereof is convex.

The fifth lens 1750 has a negative refractive power, a paraxial regionof an object-side surface thereof is concave, and a paraxial region ofan image-side surface thereof is convex.

The sixth lens 1760 has a positive refractive power, and a paraxialregion of each of an object-side surface and an image-side surfacethereof is convex.

The seventh lens 1770 has a negative refractive power, and a paraxialregion of each of an object-side surface and an image-side surfacethereof is concave.

One inflection point is formed on the object-side surface of the seventhlens 1770. In particular, the object-side surface of the seventh lens1770 is concave in the paraxial region, and becomes convex toward anedge thereof.

In addition, one inflection point is formed on the image-side surface ofthe seventh lens 1770. In particular, the image-side surface of theseventh lens 1770 is concave in the paraxial region, and becomes convextoward an edge thereof.

Although not illustrated in FIG. 33 , the stop is disposed at a distanceof 0.624 mm from the object-side surface of the first lens 1710 towardthe imaging plane of the optical imaging system. This distance is equalto TTL-SL and can be calculated from the values of TTL and SL forExample 17 listed in Table 57 that appears later in this application.

Table 33 below shows physical properties of the lenses and otherelements of the optical imaging system of FIG. 33 , and Table 34 belowshows aspherical surface coefficients of the lenses of FIG. 33 . Bothsurfaces of all of the lenses of FIG. 33 are aspherical.

TABLE 33 Effective Surface Radius of Thickness/ Index of Abbe ApertureNo. Element Curvature Distance Refraction Number Radius S1 First1.777275 0.623828 1.5441 56.1138 1.217 S2 Lens 6.456568 0.1 1.158 S3Second 4.41033 0.236253 1.6612 20.3532 1.157 S4 Lens 2.658351 0.4137851.184 S5 Third 6.587882 0.464049 1.5441 56.1138 1.177 S6 Lens 10.523280.17773 1.282 S7 Fourth 13.47488 0.362661 1.5441 56.1138 1.306 S8 Lens−20.23 0.232536 1.444 S9 Fifth −3.18309 0.2 1.6612 20.3532 1.456 S10Lens −4.21505 0.1 1.625 S11 Sixth 6.764633 0.608917 1.5441 56.1138 2.207S12 Lens −2.87919 0.421093 2.145 S13 Seventh −6.99582 0.32 1.544156.1138 2.280 S14 Lens 1.69E+00 0.14847 3.165 S15 Filter Infinity 0.111.5183 64.1664 2.850141022 S16 Infinity 0.680678 2.888122651 S17 ImagingInfinity 3.276451571 Plane

TABLE 34 K A B C D S1 −0.5383 0.0108 0.0209 −0.0477 0.0729 S2 5.8135−0.0459 0.0189 0.0248 −0.0559 S3 −10.011 −0.085 0.066 0.02 −0.0808 S4−0.1875 −0.0544 0.0068 0.26 −0.6655 S5 0 −0.0569 0.0063 −0.0275 −0.0046S6 0 −0.0775 −0.0976 0.271 −0.5329 S7 47.015 −0.0863 −0.1024 0.2298−0.2721 S8 −99 −0.0603 −0.0348 0.057 −0.0468 S9 −99 −0.2672 0.6153−0.9745 0.9138 S10 −0.0701 0.0268 −0.0377 −0.0253 0.035 S11 −97.7210.1556 −0.2109 0.1424 −0.0678 S12 −1.5998 0.2298 −0.1811 0.0905 −0.0342S13 4.8341 −0.1142 −0.0024 0.0306 −0.013 S14 −1.0993 −0.2618 0.1449−0.0599 0.0171 E F G H J S1 −0.06 0.0243 −0.0027 −0.0007 0 S2 0.0486−0.026 0.0094 −0.0019 0 S3 0.0756 −0.0332 0.0069 −0.0006 0 S4 0.9329−0.7519 0.3313 −0.061 0 S5 0.0401 −0.0485 0.0264 −0.0053 0 S6 0.5567−0.3323 0.1128 −0.0176 0 S7 0.1091 0.0392 −0.0378 0.0065 0 S8 0.0241−0.007 0.001 −6E−05 0 S9 −0.5236 0.1786 −0.0332 0.0026 0 S10 −0.01330.0024 −0.0002  7E−06 0 S11 0.02 −0.0033 0.0003 −1E−05 0 S12 0.0088−0.0014 0.0001 −4E−06 0 S13 0.0027 −0.0003  2E−05 −5E−07 0 S14 −0.00320.0004 −3E−05  1E−06 −2E−08

Eighteenth Example

FIG. 35 is a view illustrating an eighteenth example of an opticalimaging system, and FIG. 36 illustrates aberration curves of the opticalimaging system of FIG. 35 .

The eighteenth example of the optical imaging system includes a firstlens 1810, a second lens 1820, a third lens 1830, a fourth lens 1840, afifth lens 1850, a sixth lens 1860, a seventh lens 1870, a filter 1880,an image sensor 1890, and a stop (not shown) disposed between the firstlens 1810 and the second lens 1820.

The first lens 1810 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The second lens 1820 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The third lens 1830 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fourth lens 1840 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fifth lens 1850 has a positive refractive power, a paraxial regionof an object-side surface thereof is concave, and a paraxial region ofan image-side surface thereof is convex.

The sixth lens 1860 has a positive refractive power, and a paraxialregion of each of an object-side surface and an image-side surfacethereof is convex.

The seventh lens 1870 has a negative refractive power, and a paraxialregion of each of an object-side surface and an image-side surfacethereof is concave.

No inflection point is formed on the object-side surface of the seventhlens 1870.

In addition, one inflection point is formed on the image-side surface ofthe seventh lens 1870. In particular, the image-side surface of theseventh lens 1870 is concave in the paraxial region, and becomes convextoward an edge thereof.

Although not illustrated in FIG. 35 , the stop is disposed at a distanceof 0.641 mm from the object-side surface of the first lens 1810 towardthe imaging plane of the optical imaging system. This distance is equalto TTL-SL and can be calculated from the values of TTL and SL forExample 18 listed in Table 57 that appears later in this application.

Table 35 below shows physical properties of the lenses and otherelements of the optical imaging system of FIG. 35 , and Table 36 belowshows aspherical surface coefficients of the lenses of FIG. 35 . Bothsurfaces of all of the lenses of FIG. 35 are aspherical.

TABLE 35 Effective Surface Radius of Thickness/ Index of Abbe ApertureNo. Element Curvature Distance Refraction Number Radius S1 First1.797739 0.640884 1.5441 56.1138 1.270 S2 Lens 3.742203 0.119077 1.211S3 Second 3.057321 0.22 1.6612 20.3532 1.190 S4 Lens 2.795092 0.3930791.130 S5 Third 10.62153 0.464034 1.5441 56.1138 1.153 S6 Lens 9.0265620.1 1.289 S7 Fourth 7.987624 0.36214 1.5441 56.1138 1.328 S8 Lens138.7678 0.233384 1.454 S9 Fifth −4.1765 0.219829 1.6612 20.3532 1.518S10 Lens −4.13945 0.1 1.656 S11 Sixth 4.613403 0.608917 1.5441 56.11382.000 S12 Lens −3.59211 0.472598 2.038 S13 Seventh −7.00157 0.32 1.544156.1138 2.049 S14 Lens 1.69E+00 0.110689 2.685 S15 Filter Infinity 0.211.5183 64.1664 2.941536401 S16 Infinity 0.549988 3.008025404 S17 ImagingInfinity 3.291609937 Plane

TABLE 36 K A B C D E F G H J S1 −0.812 0.0136 0.0311 −0.0769 0.1226−0.1099 0.0531 −0.0116   0.0005 0 S2 −6.6917 −0.0631 0.0174 0.0714−0.1648 0.1763 −0.1086 0.0376 −0.0059 0 S3 −14.579 −0.0707 0.0068 0.1319−0.2129 0.173 −0.0715 0.0127 −0.0005 0 S4 −0.188 −0.0614 −0.0138 0.3338−0.7392 0.9251 −0.6781 0.276 −0.0477 0 S5 0 −0.0572 0.0435 −0.17330.2724 −0.2421 0.0931 −0.0042 −0.0038 0 S6 0 −0.1356 −0.0309 0.2183−0.5547 0.6931 −0.486 0.1856 −0.0304 0 S7 30.023 −0.2107 0.0007 0.1568−0.2854 0.2586 −0.1154 0.0236 −0.0019 0 S8 −99 −0.1858 −0.0192 0.2616−0.4111 0.3392 −0.1538 0.0357 −0.0033 0 S9 −98.995 −0.2935 0.5043−0.5157 0.2657 −0.0658 0.0056 0.0005 −8E−05 0 S10 −0.0701 −0.0775 0.2223−0.2703 0.1529 −0.0452 0.0073 −0.0006  2E−05 0 S11 −97.878 0.1479−0.1956 0.1288 −0.0598 0.0172 −0.0028 0.0002 −8E−06 0 S12 1.4166 0.1234−0.1416 0.087 −0.0341 0.0088 −0.0014 0.0001 −4E−06 0 S13 9.5503 −0.28640.1096 0.0149 −0.0214 0.0064 −0.0009  6E−05 −2E−06 0 S14 −1.2786 −0.30760.1777 −0.0626 0.0143 −0.0022 0.0002 −1E−05  5E−07 −7E−09

Nineteenth Example

FIG. 37 is a view illustrating a nineteenth example of an opticalimaging system, and FIG. 38 illustrates aberration curves of the opticalimaging system of FIG. 37 .

The nineteenth example of the optical imaging system includes a firstlens 1910, a second lens 1920, a third lens 1930, a fourth lens 1940, afifth lens 1950, a sixth lens 1960, a seventh lens 1970, a filter 1980,an image sensor 1990, and a stop (not shown) disposed between the secondlens 1920 and the third lens 1930.

The first lens 1910 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The second lens 1920 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The third lens 1930 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fourth lens 1940 has a positive refractive power, and a paraxialregion of each of an object-side surface and an image-side surfacethereof is convex.

The fifth lens 1950 has a negative refractive power, a paraxial regionof an object-side surface thereof is concave, and a paraxial region ofan image-side surface thereof is convex.

The sixth lens 1960 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The seventh lens 1970 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

One inflection point is formed on the object-side surface of the seventhlens 1970. In particular, the object-side surface of the seventh lens1970 is convex in the paraxial region, and becomes concave toward anedge thereof.

In addition, one inflection point is formed on the image-side surface ofthe seventh lens 1970. In particular, the image-side surface of theseventh lens 1970 is concave in the paraxial region, and becomes convextoward an edge thereof.

Although not illustrated in FIG. 37 , the stop is disposed at a distanceof 0.950 mm from the object-side surface of the first lens 1910 towardthe imaging plane of the optical imaging system. This distance is equalto TTL-SL and can be calculated from the values of TTL and SL forExample 19 listed in Table 57 that appears later in this application.

Table 37 below shows physical properties of the lenses and otherelements of the optical imaging system of FIG. 37 , and Table 38 belowshows aspherical surface coefficients of the lenses of FIG. 37 . Bothsurfaces of all of the lenses of FIG. 37 are aspherical.

TABLE 37 Surface Radius of Thickness/ Index of Abbe Effective ApertureNo. Element Curvature Distance Refraction Number Radius S1 First1.672254 0.7738 1.55 56.11 1.35 S2 Lens 6.857015 0.02 1.26 S3 Second2.191778 0.15 1.66 20.40 1.14 S4 Lens 1.616242 0.342515 1.00 S5 Third4.211432 0.212112 1.66 20.40 0.99 S6 Lens 3.706663 0.17539 1.07 S7Fourth 13.05984 0.552722 1.55 56.11 1.17 S8 Lens −10.8786 0.321736 1.34S9 Fifth −7.26453 0.16548 1.65 21.49 1.45 S10 Lens −20.0451 0.1294731.73 S11 Sixth 6.652839 0.862773 1.65 21.49 1.73 S12 Lens 6.231677 0.1422.30 S13 Seventh 2.11211 0.562819 1.54 55.71 3.10 S14 Lens 1.5459970.207518 2.87 S15 Filter Infinity 0.11 1.52 64.20 3.16 S16 Infinity0.530999 3.20 S17 Imaging Infinity 3.54 Plane

TABLE 38 K A B C D E F G H S1 −0.0875 0.0043 0.0051 −0.0107 0.0157−0.0116 0.0042 −0.0006 0 S2 25.239 −0.0649 0.2073 −0.4137 0.472 −0.31960.119 −0.019 0 S3 −1.7461 −0.1041 0.3118 −0.5508 0.6169 −0.4129 0.1566−0.0264 0 S4 −0.0238 −0.0685 0.11 −0.0081 −0.2137 0.4018 −0.2921 0.08750 S5 0.8405 −0.0823 0.0538 −0.0046 −0.0765 0.1601 −0.1299 0.0421 0 S66.608 −0.1086 0.0588 −0.0507 0.048 −0.0168 0.001 0.0003 0 S7 21.918−0.0385 −0.0011 0.0112 −0.0177 0.0301 −0.0163 0.0027 0 S8 25.736 −0.0248−0.0082 −0.0047 0.0083 −0.0029 0.0004 −2E−05 0 S9 1.6857 −0.0267 0.0322−0.1034 0.0865 −0.0378 0.0096 −0.0012 0 S10 69.409 −0.0298 0.003 −0.03340.0256 −0.0076 0.001 −5E−05 0 S11 −52.836 0.0057 −0.0573 0.0402 −0.01830.0046 −0.0006  3E−05 0 S12 −34.09 −0.0239 −0.0095 0.0073 −0.0028 0.0006−6E−05  3E−06 0 S13 −0.9427 −0.2417 0.0607 −0.0015 −0.0024 0.0006 −7E−05 4E−06 −8E−08 S14 −1.0048 −0.2102 0.0796 −0.0236 0.0052 −0.0008  7E−05−3E−06  7E−08

Twentieth Example

FIG. 39 is a view illustrating a twentieth example of an optical imagingsystem, and FIG. 40 illustrates aberration curves of the optical imagingsystem of FIG. 39 .

The twentieth example of the optical imaging system includes a firstlens 2010, a second lens 2020, a third lens 2030, a fourth lens 2040, afifth lens 2050, a sixth lens 2060, a seventh lens 2070, a filter 2080,an image sensor 2090, and a stop (not shown) disposed between the secondlens 2020 and the third lens 2030.

The first lens 2010 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The second lens 2020 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The third lens 2030 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fourth lens 2040 has a positive refractive power, and a paraxialregion of each of an object-side surface and an image-side surfacethereof is convex.

The fifth lens 2050 has a negative refractive power, a paraxial regionof an object-side surface thereof is concave, and a paraxial region ofan image-side surface thereof is convex.

The sixth lens 2060 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The seventh lens 2070 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

One inflection point is formed on the object-side surface of the seventhlens 2070. In particular, the object-side surface of the seventh lens2070 is convex in the paraxial region, and becomes concave toward anedge thereof.

In addition, one inflection point is formed on the image-side surface ofthe seventh lens 2070. In particular, the image-side surface of theseventh lens 2070 is concave in the paraxial region, and becomes convextoward an edge thereof.

Although not illustrated in FIG. 39 , the stop is disposed at a distanceof 0.940 mm from the object-side surface of the first lens 2010 towardthe imaging plane of the optical imaging system. This distance is equalto TTL-SL and can be calculated from the values of TTL and SL forExample 20 listed in Table 57 that appears later in this application.

Table 39 below shows physical properties of the lenses and otherelements of the optical imaging system of FIG. 39 , and Table 40 belowshows aspherical surface coefficients of the lenses of FIG. 39 . Bothsurfaces of all of the lenses of FIG. 39 are aspherical.

TABLE 39 Sur- Effective face Radius of Thickness/ Index of Abbe ApertureNo. Element Curvature Distance Refraction Number Radius S1 First1.672254 0.763038 1.55 56.11 1.36 S2 Lens 6.857015 0.02 1.28 S3 Second2.191778 0.15 1.66 20.40 1.16 S4 Lens 1.616242 0.376845 1.03 S5 Third4.211432 0.216572 1.66 20.40 0.99 S6 Lens 3.706663 0.1647 1.06 S7 Fourth13.05984 0.453662 1.55 56.11 1.15 S8 Lens −10.8786 0.306645 1.29 S9Fifth −7.26453 0.212383 1.65 21.49 1.46 S10 Lens −20.0451 0.110875 1.73S11 Sixth 6.652839 0.862773 1.65 21.49 1.73 S12 Lens 6.231677 0.1520192.30 S13 Seventh 2.11211 0.629635 1.54 55.71 3.10 S14 Lens 1.5459970.195628 2.89 S15 Filter Infinity 0.11 1.52 64.20 3.18 S16 Infinity0.536692 3.22 S17 Imaging Infinity 3.53 Plane

TABLE 40 K A B C D E F G H S1 −0.0875 0.0043 0.0051 −0.0107 0.0157−0.0116 0.0042 −0.0006 0 S2 25.239 −0.0649 0.2073 −0.4137 0.472 −0.31960.119 −0.019 0 S3 −1.7461 −0.1041 0.3118 −0.5508 0.6169 −0.4129 0.1566−0.0264 0 S4 −0.0238 −0.0685 0.11 −0.0081 −0.2137 0.4018 −0.2921 0.08750 S5 0.8405 −0.0823 0.0538 −0.0046 −0.0765 0.1601 −0.1299 0.0421 0 S66.608 −0.1086 0.0588 −0.0507 0.048 −0.0168 0.001 0.0003 0 S7 21.918−0.0385 −0.0011 0.0112 −0.0177 0.0301 −0.0163 0.0027 0 S8 25.736 −0.0248−0.0082 −0.0047 0.0083 −0.0029 0.0004 −2E−05 0 S9 1.6857 −0.0267 0.0322−0.1034 0.0865 −0.0378 0.0096 −0.0012 0 S10 69.409 −0.0298 0.003 −0.03340.0256 −0.0076 0.001 −5E−05 0 S11 −52.836 0.0057 −0.0573 0.0402 −0.01830.0046 −0.0006  3E−05 0 S12 −34.09 −0.0239 −0.0095 0.0073 −0.0028 0.0006−6E−05  3E−06 0 S13 −0.9427 −0.2417 0.0607 −0.0015 −0.0024 0.0006 −7E−05 4E−06 −8E−08 S14 −1.0048 −0.2102 0.0796 −0.0236 0.0052 −0.0008  7E−05−3E−06  7E−08

Twenty-First Example

FIG. 41 is a view illustrating a twenty-first example of an opticalimaging system, and FIG. 42 illustrates aberration curves of the opticalimaging system of FIG. 41 .

The twenty-first example of the optical imaging system includes a firstlens 2110, a second lens 2120, a third lens 2130, a fourth lens 2140, afifth lens 2150, a sixth lens 2160, a seventh lens 2170, a filter 2180,an image sensor 2190, and a stop (not shown) disposed between the secondlens 2120 and the third lens 2130.

The first lens 2110 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The second lens 2120 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The third lens 2130 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fourth lens 2140 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fifth lens 2150 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The sixth lens 2160 has a positive refractive power, and a paraxialregion of each of an object-side surface and an image-side surfacethereof is convex.

The seventh lens 2170 has a negative refractive power, and a paraxialregion of each of an object-side surface and an image-side surfacethereof is concave.

One inflection point is formed on the object-side surface of the seventhlens 2170. In particular, the object-side surface of the seventh lens2170 is concave in the paraxial region, and becomes convex toward anedge thereof.

In addition, one inflection point is formed on the image-side surface ofthe seventh lens 2170. In particular, the image-side surface of theseventh lens 2170 is concave in the paraxial region, and becomes convextoward an edge thereof.

Although not illustrated in FIG. 41 , the stop is disposed at a distanceof 1.002 mm from the object-side surface of the first lens 2110 towardthe imaging plane of the optical imaging system. This distance is equalto TTL-SL and can be calculated from the values of TTL and SL forExample 21 listed in Table 57 that appears later in this application.

Table 41 below shows physical properties of the lenses and otherelements of the optical imaging system of FIG. 41 , and Table 42 belowshows aspherical surface coefficients of the lenses of FIG. 41 . Bothsurfaces of all of the lenses of FIG. 41 are aspherical.

TABLE 41 Surface Radius of Thickness/ Index of Abbe Effective ApertureNo. Element Curvature Distance Refraction Number Radius S1 First1.804711 0.576863 1.544 56.114 1.270 S2 Lens 5.010949 0.040641 1.230 S3Second 4.809505 0.35454 1.544 56.114 1.204 S4 Lens 14.18784 0.03 1.158S5 Third 3.659167 0.2 1.661 20.350 1.087 S6 Lens 2.148667 0.424854 1.050S7 Fourth 21.5791 0.365358 1.544 56.114 1.050 S8 Lens 9.699008 0.0618821.187 S9 Fifth 6.23061 0.282527 1.639 21.525 1.212 S10 Lens 8.4969660.34789 1.367 S11 Sixth 10.18469 0.58471 1.544 56.114 1.650 S12 Lens−1.51715 0.356227 1.934 S13 Seventh −2.7118 0.3 1.544 56.114 2.303 S14Lens 2.063638 0.164562 2.650 S15 Filter Infinity 0.21 1.518 64.197 2.938S16 Infinity 0.639942 2.969 S17 Imaging Infinity 3.261 Plane

TABLE 42 K A B C D E F G H S1 −1.5984 0.02201 0.00112 −0.0095 0.00713−0.0076 0.00279 −0.0002 0 S2 0 −0.0267 −0.08 0.12037 −0.1085 0.07767−0.0361 0.00741 0 S3 0 0.01852 −0.0944 0.1151 −0.0877 0.07128 −0.04330.01041 0 S4 93.0315 −0.0833 0.30018 −0.6564 0.78727 −0.5697 0.2292−0.0392 0 S5 −11.518 −0.2115 0.48742 −0.8074 0.95087 −0.7204 0.32387−0.0644 0 S6 −4.4222 −0.0999 0.19853 −0.0999 −0.0975 0.27732 −0.22460.0743 0 S7 0 −0.0315 −0.1501 0.44969 −1.0958 1.44445 −1.0093 0.2957 0S8 0 −0.1532 −0.084 0.36754 −0.5986 0.47504 −0.1986 0.03659 0 S9 −76.367−0.2472 −0.1038 0.53081 −0.6528 0.42248 −0.1503 0.02265 0 S10 0 −0.1927−0.1015 0.31685 −0.3163 0.19124 −0.0703 0.01153 0 S11 0 0.02452 −0.0539−0.0674 0.10823 −0.0625 0.01679 −0.0017 0 S12 −1.5099 0.20226 −0.14510.00041 0.04309 −0.0194 0.00346 −0.0002 0 S13 −6.0002 0.00897 −0.19140.15961 −0.0593 0.01227 −0.0015 9.7E−05  −3E−06 S14 −0.8696 −0.19010.07654 −0.0229 0.00487 −0.0008 8.7E−05  −6E−06 2.5E−07

Twenty-Second Example

FIG. 43 is a view illustrating a twenty-second example of an opticalimaging system, and FIG. 44 illustrates aberration curves of the opticalimaging system of FIG. 43 .

The twenty-second optical imaging system includes a first lens 2210, asecond lens 2220, a third lens 2230, a fourth lens 2240, a fifth lens2250, a sixth lens 2260, a seventh lens 2270, a filter 2280, an imagesensor 2290, a first stop (not shown) disposed between the first lens2210 and the second lens 2220, and a second stop (not shown) disposedbetween the second lens 2220 and the third lens 2230.

The first lens 2210 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The second lens 2220 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The third lens 2230 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fourth lens 2240 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fifth lens 2250 has a positive refractive power, a paraxial regionof an object-side surface thereof is concave, and a paraxial region ofan image-side surface thereof is convex.

The sixth lens 2260 has a positive refractive power, a paraxial regionof an object-side surface thereof is concave, and a paraxial region ofan image-side surface thereof is convex.

The seventh lens 2270 has a negative refractive power, and a paraxialregion of each of an object-side surface and an image-side surfacethereof is concave.

No inflection point is formed on the object-side surface of the seventhlens 2270.

In addition, one inflection point is formed on the image-side surface ofthe seventh lens 2270. In particular, the image-side surface of theseventh lens 2270 is concave in the paraxial region, and becomes convextoward an edge thereof.

Although not illustrated in FIG. 43 , the first stop is disposed at adistance of 0.745 mm from the object-side surface of the first lens 2210toward the imaging plane of the optical imaging system. This distance isequal to TTL-SL and can be calculated from the values of TTL and SL forExample 22 listed in Table 57 that appears later in this application.

Table 43 below shows physical properties of the lenses and otherelements of the optical imaging system of FIG. 43 , and Table 44 belowshows aspherical surface coefficients of the lenses of FIG. 43 . Thefirst stop disposed between the first lens 2210 and the second lens 2220as discussed above is not shown in Table 43. Both surfaces of all of thelenses of FIG. 43 are aspherical.

TABLE 43 Effective Surface Radius of Thickness/ Index of Abbe ApertureNo. Element Curvature Distance Refraction Number Radius S1 First1.900246 0.745113 1.546 56.114 1.333 S2 Lens 12.01797 0.031785 1.275 S3Second 7.105147 0.228148 1.667 20.353 1.244 S4 Lens 3.509972 0.3487581.141 S5 Second Infinity 0 1.205 Stop S6 Third 24.3886 0.459414 1.54656.114 1.175 S7 Lens 62.53356 0.180582 1.274 S8 Fourth 11.10403 0.281.667 20.353 1.280 S9 Lens 13.72056 0.379284 1.448 S10 Fifth −4.771880.546513 1.546 56.114 1.853 S11 Lens −1.71685 0.051852 2.170 S12 Sixth−6.60097 0.558512 1.546 56.114 2.409 S13 Lens −4.17937 0.372518 2.655S14 Seventh −4.57649 0.414815 1.546 56.114 3.009 S15 Lens 2.2E+000.141964 3.37037 S16 Filter Infinity 0.114074 1.518 64.16641 3.864216S17 Infinity 0.746675 3.903345 S18 Imaging Infinity 4.326018 Plane

TABLE 44 K A B C D E F G H J S1 −0.9474 0.01532 0.01685 −0.037 0.06054−0.0609 0.03661 −0.0123 0.0017 0 S2 −30.447 −0.1419 0.43283 −0.7980.97201 −0.7804 0.38946 −0.1078 0.01244 0 S3 6.01402 −0.1777 0.51041−0.9603 1.25601 −1.0984 0.60482 −0.1853 0.02373 0 S4 −0.421 −0.05970.1562 −0.2512 0.29455 −0.2097 0.07608 −0.0015 −0.0042 0 S6 0 −0.04690.01011 −0.0076 −0.0395 0.08831 −0.0878 0.04425 −0.0087 0 S7 0 −0.1160.09293 −0.2202 0.37209 −0.3982 0.24503 −0.0797 0.01043 0 S8 −7.5−0.1862 0.04273 −0.0355 −0.0447 0.21236 −0.2603 0.13349 −0.0249 0 S9−43.343 −0.1172 0.0133 0.00326 −0.0126 0.03781 −0.0404 0.01766 −0.0026 0S10 −44.496 −0.0891 0.14043 −0.1469 0.09433 −0.0347 0.00517 0.00026−0.0001 0 S11 −1.6506 0.07781 −0.0605 0.03731 −0.0172 0.00587 −0.00130.00015  −7E−06 0 S12 2.03896 0.16692 −0.1825 0.11151 −0.0456 0.01136−0.0016 0.00012  −4E−06 0 S13 −0.4347 0.15501 −0.1544 0.08127 −0.02710.00578 −0.0008 5.4E−05  −2E−06 0 S14 −2.5068 −0.0042 −0.0908 0.05928−0.017 0.00273 −0.0003 1.3E−05  −3E−07 0 S15 −1.4448 −0.1279 0.04264−0.0109 0.00223 −0.0004 4E−05  −3E−06 1.2E−07 −2E−09

Twenty-Third Example

FIG. 45 is a view illustrating a twenty-third example of an opticalimaging system, and FIG. 46 illustrates aberration curves of the opticalimaging system of FIG. 45 .

The twenty-third example of the optical imaging system includes a firstlens 2310, a second lens 2320, a third lens 2330, a fourth lens 2340, afifth lens 2350, a sixth lens 2360, a seventh lens 2370, a filter 2380,an image sensor 2390, and a stop (not shown) disposed between the secondlens 2320 and the third lens 2330.

The first lens 2310 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The second lens 2320 has a positive refractive power, and a paraxialregion of each of an object-side surface and an image-side surfacethereof is convex.

The third lens 2330 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fourth lens 2340 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fifth lens 2350 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The sixth lens 2360 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The seventh lens 2370 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

One inflection point is formed on the object-side surface of the seventhlens 2370. In particular, the object-side surface of the seventh lens2370 is convex in the paraxial region, and becomes concave toward anedge thereof.

In addition, one inflection point is formed on the image-side surface ofthe seventh lens 2370. In particular, the image-side surface of theseventh lens 2370 is concave in the paraxial region, and becomes convextoward an edge thereof.

Although not illustrated in FIG. 45 , the stop is disposed at a distanceof 1.250 mm from the object-side surface of the first lens 2310 towardthe imaging plane of the optical imaging system. This distance is equalto TTL-SL and can be calculated from the values of TTL and SL forExample 23 listed in Table 57 that appears later in this application.

Table 45 below shows physical properties of the lenses and otherelements of the optical imaging system of FIG. 45 , and Table 46 belowshows aspherical surface coefficients of the lenses of FIG. 45 . Bothsurfaces of all of the lenses of FIG. 45 are aspherical.

TABLE 45 Effective Surface Radius of Thickness/ Index of Abbe ApertureNo. Element Curvature Distance Refraction Number Radius S1 First2.266953728 0.4 1.546 56.114 1.380 S2 Lens 2.669137967 0.0250635 1.337S3 Second 2.623824881 0.8 1.546 56.114 1.337 S4 Lens −11.8758231 0.0251.298 S5 Third 19.00320484 0.2526007 1.679 19.236 1.202 S6 Lens4.067642359 0.4108424 1.242 S7 Fourth 6.69913266 0.35 1.679 19.236 1.265S8 Lens 7.219976522 0.4295582 1.369 S9 Fifth 21.53098541 0.35 1.54656.114 1.600 S10 Lens 7.891788096 0.025 1.853 S11 Sixth 2.50304521 0.431.546 56.114 1.908 S12 Lens 2.4092608 0.2398918 2.372 S13 Seventh1.327452067 0.5253623 1.546 56.114 2.507 S14 Lens 1.19470686 0.32152452.738 S15 Filter Infinity 0.21 1.518 64.197 3.205 S16 Infinity 0.70515653.285 S17 Imaging Infinity 3.781 Plane

TABLE 46 K A B C D E F G H J S1 −1 0.00124 −0.0631 0.08838 −0.0759−0.0183 0.08244 −0.0602 0.01898 −0.0023 S2 −11.056 0.03802 0.1354−0.9871 1.56411 −1.0995 0.32652 0.01084 −0.0287 0.00476 S3 −0.7436−0.0807 0.57903 −1.9725 2.93458 −2.2115 0.82233 −0.0859 −0.0317 0.00756S4 −7.2488 −0.1245 0.58766 −1.6544 2.89527 −3.2415 2.31185 −1.01270.24733 −0.0257 S5 12.3372 −0.1601 0.47507 −0.9119 1.14181 −0.90590.42126 −0.0904 −0.0021 0.0031 S6 −0.7614 −0.0925 0.17494 −0.23490.22825 −0.1666 0.07717 −0.0124 −0.0054 0.00212 S7 −12.018 0.04701−0.734 2.69199 −5.8982 8.06267 −6.9318 3.6331 −1.0592 0.13158 S8 5.83969−0.055 0.02382 −0.178 0.4679 −0.6732 0.58024 −0.2983 0.08447 −0.0101 S9−43.467 0.02077 −0.0298 0.06441 −0.1157 0.10183 −0.0488 0.0125 −0.00167.1E−05 S10 −10.152 −0.0392 0.01463 0.02558 −0.0749 0.06753 −0.03050.00743 −0.0009 4.7E−05 S11 −16.19 0.09146 −0.1594 0.2045 −0.2282 0.1461−0.0541 0.01173 −0.0014 6.9E−05 S12 −0.0871 −0.1985 0.32772 −0.33090.18662 −0.0647 0.01412 −0.0019 0.00014  −4E−06 S13 −0.8728 −0.4620.28732 −0.1331 0.04466 −0.0104 0.00163 −0.0002 9.4E−06  −2E−07 S14−1.5388 −0.3036 0.18437 −0.0807 0.02315 −0.0042 0.00046 −3E−05   1E−06 −1E−08

Twenty-Fourth Example

FIG. 47 is a view illustrating a twenty-fourth example of an opticalimaging system, and FIG. 48 illustrates aberration curves of the opticalimaging system of FIG. 47 .

The twenty-fourth example of the optical imaging system includes a firstlens 2410, a second lens 2420, a third lens 2430, a fourth lens 2440, afifth lens 2450, a sixth lens 2460, a seventh lens 2470, a filter 2480,an image sensor 2490, and a stop (not shown) disposed between the secondlens 2420 and the third lens 2430.

The first lens 2410 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The second lens 2420 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The third lens 2430 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fourth lens 2440 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fifth lens 2450 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The sixth lens 2460 has a negative refractive power, and a paraxialregion of each of an object-side surface and an image-side surfacethereof is concave.

The seventh lens 2470 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

Two inflection points are formed on the object-side surface of theseventh lens 2470. In particular, the object-side surface of the seventhlens 2470 is convex in the paraxial region, becomes concave in a regionoutside the paraxial region, and becomes convex toward an edge thereof.

In addition, one inflection point is formed on the image-side surface ofthe seventh lens 2470. In particular, the image-side surface of theseventh lens 2470 is concave in the paraxial region, and becomes convextoward an edge thereof.

Although not illustrated in FIG. 47 , the stop is disposed at a distanceof 0.951 mm from the object-side surface of the first lens 2410 towardthe imaging plane of the optical imaging system. This distance is equalto TTL-SL and can be calculated from the values of TTL and SL forExample 24 listed in Table 57 that appears later in this application.

Table 47 below shows physical properties of the lenses and otherelements of the optical imaging system of FIG. 47 , and Table 48 belowshows aspherical surface coefficients of the lenses of FIG. 47 . Bothsurfaces of all of the lenses of FIG. 47 are aspherical.

TABLE 47 Effective Surface Radius of Thickness/ Index of Abbe ApertureNo. Element Curvature Distance Refraction Number Radius S1 First1.747305824 0.6964434 1.546 56.114 1.280 S2 Lens 9.408357314 0.025 1.247S3 Second 2.976586304 0.23 1.667 20.353 1.150 S4 Lens 1.9564240170.3428009 1.007 S5 Third 16.8676436 0.2300239 1.667 20.353 1.032 S6 Lens16.01257049 0.0294424 1.089 S7 Fourth 7.314351738 0.356959 1.546 56.1141.130 S8 Lens 17.39191974 0.3707783 1.228 S9 Fifth 11.56172447 0.36082021.656 21.525 1.317 S10 Lens 6.918405514 0.2917084 1.657 S11 Sixth−97.16346173 0.5907913 1.656 21.525 1.878 S12 Lens 17.27666898 0.03012532.338 S13 Seventh 1.932241094 0.8257708 1.546 56.114 2.961 S14 Lens1.739016534 0.2207138 3.015 S15 Filter Infinity 0.21 1.518 64.197 3.305S16 Infinity 0.6498919 3.375 S17 Imaging Infinity 3.731 Plane

TABLE 48 K A B C D E F G H J S1 −0.3029 0.00034 0.02484 −0.0645 0.08868−0.0757 0.0373 −0.0109 0.00139 0 S2 0.99973 −0.0385 0.05948 −0.06390.00521 0.0552 −0.0624 0.02956 −0.0054 0 S3 −1.759 −0.0559 0.07693−0.084 0.09591 −0.0711 0.03087 −0.0026 −0.0012 0 S4 −0.2233 −0.022−0.0153 0.13577 −0.2648 0.33105 −0.2167 0.05099 0.00976 0 S5 −0.8179−0.0092 −0.0103 −0.1607 0.63034 −1.1881 1.27457 −0.7449 0.18468 0 S6−0.0005 0.01997 −0.1312 0.11419 −0.0014 0.0632 −0.1761 0.13356 −0.0335 0S7 −31.717 0.02656 −0.0935 −0.0104 0.2126 −0.2049 0.0541 0.02004 −0.00980 S8 −1.0151 −0.0315 0.02884 −0.0714 0.09345 −0.1394 0.17678 −0.13440.05241 −0.0076 S9 0.382 −0.1094 0.03271 −0.0826 0.21377 −0.3162 0.24272−0.0962 0.01564 0 S10 −27.524 −0.0394 −0.117 0.16282 −0.1238 0.05513−0.0144 0.00227 −0.0002 0 S11 23.2031 0.18019 −0.2793 0.22076 −0.12580.0475 −0.0113 0.00159 −0.0001 0 S12 −49.948 0.03358 −0.0362 0.00983−0.0011 −0.0001 7.6E−05 −1E−05 6.1E−07 0 S13 −1.8504 −0.2437 0.10759−0.031 0.00661 −0.001 0.0001 −6E−06 1.5E−07 0 S14 −0.8299 −0.173 0.06293−0.0196 0.00438 −0.0006 5.8E−05 −3E−06 6.1E−08 0

Twenty-Fifth Example

FIG. 49 is a view illustrating a twenty-fifth example of an opticalimaging system, and FIG. 50 illustrates aberration curves of the opticalimaging system of FIG. 49 .

The twenty-fifth example of the optical imaging system includes a firstlens 2510, a second lens 2520, a third lens 2530, a fourth lens 2540, afifth lens 2550, a sixth lens 2560, a seventh lens 2570, a filter 2580,an image sensor 2590, and a stop (not shown) disposed between the secondlens 2520 and the third lens 2530.

The first lens 2510 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The second lens 2520 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The third lens 2530 has a positive refractive power, a paraxial regionof an object-side surface thereof is concave, and a paraxial region ofan image-side surface thereof is convex.

The fourth lens 2540 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fifth lens 2550 has a positive refractive power, a paraxial regionof an object-side surface thereof is concave, and a paraxial region ofan image-side surface thereof is convex.

The sixth lens 2560 has a positive refractive power, a paraxial regionof an object-side surface thereof is concave, and a paraxial region ofan image-side surface thereof is convex.

The seventh lens 2570 has a negative refractive power, and a paraxialregion of each of an object-side surface and an image-side surfacethereof is concave.

No inflection point is formed on the object-side surface of the seventhlens 2570.

In addition, one inflection point is formed on the image-side surface ofthe seventh lens 2570. In particular, the image-side surface of theseventh lens 2570 is concave in the paraxial region, and becomes convextoward an edge thereof.

Although not illustrated in FIG. 49 , the stop is disposed at a distanceof 0.872 mm from the object-side surface of the first lens 2510 towardthe imaging plane of the optical imaging system. This distance is equalto TTL-SL and can be calculated from the values of TTL and SL forExample 25 listed in Table 57 that appears later in this application.

Table 49 below shows physical properties of the lenses and otherelements of the optical imaging system of FIG. 49 , and Table 50 belowshows aspherical surface coefficients of the lenses of FIG. 49 . Bothsurfaces of all of the lenses of FIG. 49 are aspherical.

TABLE 49 Effective Surface Radius of Thickness/ Index of Abbe ApertureNo. Element Curvature Distance Refraction Number Radius S1 First1.76028791 0.6171815 1.546 56.114 1.100 S2 Lens 14.12333348 0.025 1.040S3 Second 5.834118934 0.23 1.667 20.353 1.011 S4 Lens 3.1226714460.3733379 0.919 S5 Third −49.94173366 0.3798697 1.546 56.114 0.995 S6Lens −15.18699611 0.1809039 1.096 S7 Fourth 23.36800299 0.3031664 1.66720.353 1.124 S8 Lens 12.20982926 0.3354305 1.309 S9 Fifth −4.3947719820.4728905 1.546 56.114 1.471 S10 Lens −1.598299305 0.025 1.698 S11 Sixth−6.081499124 0.5446656 1.546 56.114 1.822 S12 Lens −3.0145335390.2724323 2.192 S13 Seventh −6.149442968 0.42237 1.546 56.114 2.462 S14Lens 1.636694252 0.1933361 2.880 S15 Filter Infinity 0.21 1.518 64.1973.223 S16 Infinity 0.6544156 3.300 S17 Imaging Infinity 3.728 Plane

TABLE 50 K A B C D E F G H J S1 −1.0054 0.02246 0.02216 −0.0696 0.16036−0.2238 0.18065 −0.0791 0.01412 0 S2 −1.5097 −0.1275 0.3975 −0.69820.68012 −0.322 0.02875 0.02904 −0.0076 0 S3 6.02943 −0.163 0.45041−0.8514 1.05249 −0.8203 0.42351 −0.138 0.0213 0 S4 −0.8846 −0.04490.03929 0.15739 −0.6934 1.31707 −1.3069 0.67995 −0.143 0 S5 0 −0.0513−0.0193 −0.016 0.00429 0.00341 −0.0155 0.03192 −0.0128 0 S6 0 −0.1089−0.0569 0.35761 −0.9255 1.19468 −0.8604 0.33221 −0.0547 0 S7 −7.5−0.2139 −0.0107 0.17878 −0.1827 −0.1159 0.3046 −0.1897 0.04049 0 S8−43.341 −0.1402 −0.061 0.2777 −0.4123 0.3523 −0.1857 0.05641 −0.0071 0S9 −35.081 −0.0602 0.07357 −0.1046 0.10843 −0.0726 0.02553 −0.00410.00022 0 S10 −1.5734 0.16205 −0.2197 0.18955 −0.107 0.03959 −0.00910.00113  −6E−05 0 S11 0.51533 0.21373 −0.3167 0.23989 −0.1217 0.03837−0.0069 0.00066  −3E−05 0 S12 −1.1466 0.19671 −0.2565 0.15417 −0.05320.01146 −0.0015 0.00012  −4E−06 0 S13 −0.9056 −0.0077 −0.2094 0.18829−0.0749 0.01671 −0.0022 0.00015  −5E−06 0 S14 −1.2797 −0.2192 0.10065−0.0338 0.00878 −0.0018 0.00026 −2E−05 1.3E−06 −3E−08

Twenty-Sixth Example

FIG. 51 is a view illustrating a twenty-sixth example of an opticalimaging system, and FIG. 52 illustrates aberration curves of the opticalimaging system of FIG. 51 .

The twenty-sixth example of the optical imaging system includes a firstlens 2610, a second lens 2620, a third lens 2630, a fourth lens 2640, afifth lens 2650, a sixth lens 2660, a seventh lens 2670, a filter 2680,an image sensor 2690, and a stop (not shown) disposed between the secondlens 2620 and the third lens 2630.

The first lens 2610 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The second lens 2620 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The third lens 2630 has a positive refractive power, a paraxial regionof an object-side surface thereof is concave. and a paraxial region ofan image-side surface thereof is convex.

The fourth lens 2640 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fifth lens 2650 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The sixth lens 2660 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The seventh lens 2670 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

Two inflection points are formed on the object-side surface of theseventh lens 2670. In particular, the object-side surface of the seventhlens 2670 is convex in the paraxial region, becomes concave in a regionoutside the paraxial region, and becomes convex toward an edge thereof.

In addition, one inflection point is formed on the image-side surface ofthe seventh lens 2670. In particular, the image-side surface of theseventh lens 2670 is concave in the paraxial region, and becomes convextoward an edge thereof.

Although not illustrated in FIG. 51 , the stop is disposed at a distanceof 0.866 mm from the object-side surface of the first lens 2610 towardthe imaging plane of the optical imaging system. This distance is equalto TTL-SL and can be calculated from the values of TTL and SL forExample 26 listed in Table 57 that appears later in this application.

Table 51 below shows physical properties of the lenses and otherelements of the optical imaging system of FIG. 51 , and Table 52 belowshows aspherical surface coefficients of the lenses of FIG. 51 . Bothsurfaces of all of the lenses of FIG. 51 are aspherical.

TABLE 51 Effective Surface Radius of Thickness/ Index of Abbe ApertureNo. Element Curvature Distance Refraction Number Radius S1 First1.882954913 0.5871918 1.546 56.114 1.050 S2 Lens 18.07331507 0.04919760.962 S3 Second 4.599463678 0.23 1.667 20.353 0.934 S4 Lens 2.5463774740.3929389 0.837 S5 Third −21.75460448 0.2744632 1.546 56.114 1.100 S6Lens −13.51443301 0.0611157 1.106 S7 Fourth 25.33486158 0.2655293 1.54656.114 1.200 S8 Lens 25.33602848 0.3710469 1.285 S9 Fifth 9.4681880480.3930453 1.656 21.525 1.500 S10 Lens 5.10288098 0.3790363 1.754 S11Sixth 6.416223875 0.888499 1.546 56.114 2.041 S12 Lens 6.3520620010.0460253 2.631 S13 Seventh 1.966539749 0.8854198 1.536 55.656 3.050 S14Lens 1.769884599 0.3097825 3.456 S15 Filter Infinity 0.21 1.518 64.1973.768 S16 Infinity 0.65 3.829 S17 Imaging Infinity 4.129 Plane

TABLE 52 K A B C D E F G H J S1 −0.1525 0.00346 0.00541 −0.0238 0.05874−0.0925 0.08078 −0.0376 0.00687 0 S2 −36.188 −0.0554 0.19103 −0.49540.90918 −1.1194 0.84898 −0.3546 0.06168 0 S3 −0.1164 −0.0883 0.22642−0.5273 0.9947 −1.274 1.01042 −0.4343 0.07596 0 S4 0.3326 −0.04620.09702 −0.2316 0.5455 −0.848 0.78539 −0.3759 0.07082 0 S5 51.7577−0.0119 −0.0911 0.36173 −0.9067 1.38454 −1.3014 0.68351 −0.1493 0 S642.1637 0.0924 −0.5269 1.35579 −2.2584 2.50931 −1.8107 0.76109 −0.139 0S7 −4.7579 0.13357 −0.5938 1.26101 −1.8115 1.7924 −1.1666 0.44267−0.0728 0 S8 −3.4393 0.04714 −0.1842 0.28859 −0.3575 0.32734 −0.19710.06695 −0.0093 0 S9 −8.5449 −0.0502 −0.0588 0.15989 −0.2027 0.13981−0.0542 0.01046 −0.0007 0 S10 −18.064 −0.044 −0.0734 0.14254 −0.13030.06906 −0.0217 0.00378 −0.0003 0 S11 −4.6497 0.06328 −0.1193 0.08822−0.0426 0.01348 −0.0028 0.00037  −2E−05 0 S12 −50 0.03403 −0.04970.02457 −0.0072 0.00126 −0.0001 6.9E−06  −2E−07 0 S13 −2.4291 −0.12010.01667 0.00224 −0.0009 0.00011 −6E−06 1.3E−07 8.8E−10 0 S14 −1.0032−0.1111 0.02485 −0.0032 −0.0001 0.00013 −2E−05 1.9E−06  −8E−08 1.4E−09

Twenty-Seventh Example

FIG. 53 is a view illustrating a twenty-seventh example of an opticalimaging system, and FIG. 54 illustrates aberration curves of the opticalimaging system of FIG. 53 .

The twenty-seventh example of the optical imaging system includes afirst lens 2710, a second lens 2720, a third lens 2730, a fourth lens2740, a fifth lens 2750, a sixth lens 2760, a seventh lens 2770, afilter 2780, an image sensor 2790, and a stop (not shown) disposedbetween the second lens 2720 and the third lens 2730.

The first lens 2710 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The second lens 2720 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The third lens 2730 has a positive refractive power, a paraxial regionof an object-side surface thereof is concave, and a paraxial region ofan image-side surface thereof is convex.

The fourth lens 2740 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fifth lens 2750 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The sixth lens 2760 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The seventh lens 2770 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

Two inflection points are formed on the object-side surface of theseventh lens 2770. In particular, the object-side surface of the seventhlens 2770 is convex in the paraxial region, becomes concave in a regionoutside the paraxial region, and becomes convex toward an edge thereof.

In addition, one inflection point is formed on the image-side surface ofthe seventh lens 2770. In particular, the image-side surface of theseventh lens 2770 is concave in the paraxial region, and becomes convextoward an edge thereof.

Although not illustrated in FIG. 53 , the stop is disposed at a distanceof 0.904 mm from the object-side surface of the first lens 2710 towardthe imaging plane of the optical imaging system. This distance is equalto TTL-SL and can be calculated from the values of TTL and SL forExample 27 listed in Table 57 that appears later in this application.

Table 53 below shows physical properties of the lenses and otherelements of the optical imaging system of FIG. 53 , and Table 54 belowshows aspherical surface coefficients of the lenses of FIG. 53 . Bothsurfaces of all of the lenses of FIG. 53 are aspherical.

TABLE 53 Effective Surface Radius of Thickness/ Index of Abbe ApertureNo. Element Curvature Distance Refraction Number Radius S1 First1.898698558 0.6486367 1.546 56.114 1.260 S2 Lens 7.35678597 0.025 1.216S3 Second 3.87893073 0.23 1.667 20.353 1.161 S4 Lens 2.7620088910.3408168 1.053 S5 Third −50.1241934 0.2818618 1.546 56.114 1.120 S6Lens −14.98893663 0.0597334 1.158 S7 Fourth 12.04981408 0.269789 1.54656.114 1.220 S8 Lens 12.56574443 0.2918619 1.320 S9 Fifth 9.5925759830.35 1.667 20.353 1.520 S10 Lens 5.27478585 0.3343756 1.762 S11 Sixth6.87350249 0.8484117 1.546 56.114 2.052 S12 Lens 7.493319886 0.05911052.641 S13 Seventh 2.033708385 0.8835732 1.536 55.656 3.070 S14 Lens1.843638917 0.3047846 3.425 S15 Filter Infinity 0.21 1.518 64.197 3.764S16 Infinity 0.659116 3.825 S17 Imaging Infinity 4.134 Plane

TABLE 54 K A B C D E F G H J S1 −0.1061 −0.0082 0.0469 −0.0925 0.08107−0.0129 −0.032 0.02237 −0.0047 0 S2 −36.188 −0.0502 0.16245 −0.40290.69307 −0.7643 0.50209 −0.1789 0.02641 0 S3 0.0036 −0.0795 0.20571−0.548 1.07416 −1.291 0.90975 −0.3412 0.05201 0 S4 0.40382 −0.03250.08844 −0.3009 0.70037 −0.9194 0.67381 −0.2424 0.03077 0 S5 51.75770.00548 −0.1746 0.50176 −0.9395 1.14417 −0.9144 0.4407 −0.0937 0 S642.1637 0.09529 −0.4992 1.03966 −1.2284 0.81694 −0.2802 0.03842   4E−060 S7 −4.7579 0.1185 −0.4938 0.85535 −0.8643 0.51674 −0.185 0.04168−0.0054 0 S8 −3.4393 0.04916 −0.194 0.31472 −0.3773 0.32494 −0.18780.06297 −0.0088 0 S9 −8.5449 −0.0638 0.02895 −0.0884 0.16492 −0.1710.09832 −0.0306 0.00409 0 S10 −18.064 −0.0543 −0.0172 0.03209 −0.01790.00397 4.6E−06 −0.0001 7.7E−06 0 S11 −4.6497 0.05354 −0.0909 0.06134−0.0311 0.01102 −0.0026 0.00036  −2E−05 0 S12 −50 0.01031 −0.01760.00573 −0.0015 0.0003 −4E−05 2.4E−06  −6E−08 0 S13 −2.606 −0.11770.01922 −0.0004 −1E−04  −1E−05 4.5E−06  −4E−07 9.4E−09 0 S14 −1.0102−0.0979 0.01866 −0.0024 0.00013 2.1E−05  −6E−06 5.9E−07  −3E−08 5.6E−10

Twenty-Eighth Example

FIG. 55 is a view illustrating a twenty-eighth example of an opticalimaging system, and FIG. 56 illustrates aberration curves of the opticalimaging system of FIG. 55 .

The twenty-eighth example of the optical imaging system includes a firstlens 2810, a second lens 2820, a third lens 2830, a fourth lens 2840, afifth lens 2850, a sixth lens 2860, a seventh lens 2870, a filter 2880,an image sensor 2890, and a stop (not shown) disposed between the secondlens 2820 and the third lens 2830.

The first lens 2810 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The second lens 2820 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The third lens 2830 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fourth lens 2840 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The fifth lens 2850 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The sixth lens 2860 has a positive refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

The seventh lens 2870 has a negative refractive power, a paraxial regionof an object-side surface thereof is convex, and a paraxial region of animage-side surface thereof is concave.

One inflection point is formed on the object-side surface of the seventhlens 2870. In particular, the object-side surface of the seventh lens2870 is convex in the paraxial region, and becomes concave toward anedge thereof.

In addition, one inflection point is formed on the image-side surface ofthe seventh lens 2870. In particular, the image-side surface of theseventh lens 2870 is concave in the paraxial region, and becomes convextoward an edge thereof.

Although not illustrated in FIG. 55 , the stop is disposed at a distanceof 1.250 mm from the object-side surface of the first lens 2810 towardthe imaging plane of the optical imaging system. This distance is equalto TTL-SL and can be calculated from the values of TTL and SL forExample 28 listed in Table 57 that appears later in this application.

Table 55 below shows physical properties of the lenses and otherelements of the optical imaging system of FIG. 55 , and Table 56 belowshows aspherical surface coefficients of the lenses of FIG. 55 . Bothsurfaces of all of the lenses of FIG. 55 are aspherical.

TABLE 55 Effective Surface Radius of Thickness/ Index of Abbe ApertureNo. Element Curvature Distance Refraction Number Radius S1 First2.281286206 0.4941042 1.546 56.114 1.640 S2 Lens 2.718984257 0.1308341.629 S3 Second 2.708968394 0.6 1.546 56.114 1.595 S4 Lens 37.245138770.025 1.593 S5 Third 11.09599614 0.23 1.679 19.236 1.522 S6 Lens4.325963413 0.4819872 1.450 S7 Fourth 8.709066519 0.3517002 1.656 21.5251.514 S8 Lens 14.98893268 0.4925536 1.555 S9 Fifth 5.340621183 0.42568591.679 19.236 1.840 S10 Lens 2.972144757 0.1952429 2.415 S11 Sixth2.121089724 0.5425262 1.546 56.114 2.362 S12 Lens 4.981824211 0.42120412.717 S13 Seventh 2.499873488 0.5046002 1.546 56.114 3.169 S14 Lens1.479444218 0.222977 3.372 S15 Filter Infinity 0.21 1.518 64.197 3.779S16 Infinity 0.6715509 3.848 S17 Imaging Infinity 4.210 Plane

TABLE 56 K A B C D E F G H J S1 −0.9867 −0.0114 0.01114 −0.0538 0.09172−0.0925 0.05422 −0.0183 0.00331 −0.0003 S2 −12.035 0.04793 −0.1730.26373 −0.3194 0.25969 −0.1301 0.03858 −0.0062 0.00042 S3 −0.9455−0.0107 −0.0528 0.10537 −0.1922 0.21871 −0.1388 0.04987 −0.0096 0.00078S4 3.03842 −0.0418 0.21624 −0.5714 0.81428 −0.6941 0.36425 −0.11540.02022 −0.0015 S5 10.1638 −0.0842 0.25831 −0.5961 0.84391 −0.74130.40425 −0.1328 0.02406 −0.0018 S6 2.08088 −0.0648 0.14243 −0.29050.40945 −0.3776 0.22243 −0.0802 0.01628 −0.0014 S7 −13.097 −0.0215−0.0518 0.14502 −0.2583 0.27772 −0.1843 0.07327 −0.0157 0.00138 S85.85919 −0.0435 0.0377 −0.0856 0.10737 −0.0887 0.04789 −0.0161 0.00312−0.0003 S9 −43.521 −0.0279 0.02278 0.01043 −0.0468 0.04676 −0.02530.00785 −0.0013 9.2E−05 S10 −17.628 −0.0671 0.04256 −0.0048 −0.01030.00685 −0.0022 0.00038  −4E−05 1.4E−06 S11 −9.8081 0.04258 −0.10250.09185 −0.0514 0.01771 −0.0039 0.00056  −5E−05 1.6E−06 S12 −0.06950.00481 −0.0496 0.03792 −0.0164 0.00397 −0.0005 3.5E−05  −8E−07  −1E−08S13 −0.6908 −0.2261 0.04088 0.01294 −0.0077 0.00168 −0.0002 1.5E−05 −6E−07 9.5E−09 S14 −1.419 −0.2123 0.09039 −0.0281 0.00628 −0.0019.3E−05  −6E−06 1.8E−07  −2E−09

Table 57 below shows an overall focal length f of the optical imagingsystem, an overall length TTL of the optical imaging system (a distancealong the optical axis from the object-side surface of the first lens tothe imaging plane), a distance SL along the optical axis from the stopto the imaging plane, an f-number (F No.) of the optical imaging system(the overall focal length f of the optical imaging system divided by thediameter of an entrance pupil of the optical imaging system, where bothf and the diameter of the entrance pupil are expressed in mm), an imageheight (IMG HT) on the imaging plane (one-half of a diagonal length ofthe imaging plane), and a field of view (FOV) of the optical imagingsystem for each of Examples 1-28 described herein. The values of f, TTL,SL, and IMG HT are expressed in mm. The values of F No. aredimensionless values. The values of FOV are expressed in degrees.

TABLE 57 Example f TTL SL F No. IMG HT FOV 1 4.824 6.000 5.071 1.514.000 78.10 2 4.803 6.000 5.046 1.48 4.000 78.40 3 4.650 5.400 4.4231.80 4.000 80.00 4 4.804 5.750 4.688 1.60 3.930 77.10 5 4.780 5.8274.402 1.57 4.050 79.02 6 3.950 4.819 3.650 1.58 3.250 77.47 7 4.3505.300 4.917 1.58 3.384 79.58 8 4.020 4.901 4.565 1.58 3.400 79.28 94.784 5.787 5.364 1.58 4.000 78.52 10 4.280 5.100 4.369 1.71 3.535 77.8411 4.450 5.400 4.669 1.69 3.261 71.28 12 4.144 5.026 4.299 1.58 3.26175.78 13 4.401 5.300 4.142 1.69 3.728 79.31 14 4.511 5.500 4.420 1.663.728 77.85 15 4.823 5.865 4.687 1.66 3.728 73.38 16 4.447 5.144 4.8942.07 3.528 75.63 17 4.400 5.200 4.576 1.81 3.261 72.55 18 3.994 5.1254.484 1.57 3.261 77.38 19 4.390 5.260 4.310 1.67 3.528 76.69 20 4.3405.260 4.320 1.62 3.528 76.91 21 4.020 4.940 3.938 1.58 3.226 76.00 224.594 5.600 4.855 1.72 4.200 83.44 23 4.498 5.500 4.250 1.63 3.728 78.0124 4.586 5.461 4.510 1.79 3.728 76.96 25 4.302 5.240 4.368 1.95 3.72880.46 26 4.966 5.993 5.127 2.36 4.128 78.45 27 4.667 5.797 4.893 1.854.128 81.80 28 4.870 6.000 4.750 1.48 4.200 80.29

Table 58 below shows in mm a focal length f1 of the first lens, a focallength f2 of the second lens, a focal length f3 of the third lens, afocal length f4 of the fourth lens, a focal length f5 of the fifth lens,a focal length f6 of the sixth lens, and a focal length f7 of theseventh lens for each of Examples 1-28 described herein.

TABLE 58 Example f1 f2 f3 f4 f5 f6 f7 1 4.756 −12.434 26.345 −55.140−12.854 2.765 −2.459 2 4.773 −12.361 26.634 −55.618 −12.673 2.699 −2.4323 4.178 −8.893 18.275 37.848 −15.676 30.527 −16.070 4 4.277 −10.45521.003 35.561 −16.519 80.332 −15.182 5 10.035 5.292 −7.613 22346862.0586.584 −27.728 146.074 6 8.409 4.355 −6.520 −4512.292 74.369 −22.4521842.731 7 −64.233 3.248 −7.428 −43.722 52.425 3.010 −2.424 8 −38.6622.911 −6.813 −43.728 59.023 2.640 −2.116 9 −104.603 3.650 −8.142 −56.41957.869 3.443 −2.762 10 3.596 −7.349 −1245 15.657 −19.723 2.662 −2.171 113.631 −7.630 −365 15.385 −24.532 2.360 −1.874 12 3.570 −7.440 −291.94116.218 −22.370 2.450 −2.041 13 9.952 4.985 −9.042 −60.959 28.461 −19.130−36.205 14 12.217 6.017 −9.925 25.358 28.723 −32.884 −16.737 15 13.6646.556 −11.435 32.295 28.328 −36.885 −22.967 16 3.626 −6.978 10.551125.381 −28.155 −367.720 −9.031 17 4.290 −10.606 30.978 14.871 −21.1333.784 −2.465 18 5.677 −73.551 −122.716 15.510 207.375 3.799 −2.466 193.840 −10.270 −55.690 10.940 −17.400 −800 −16.450 20 3.840 −10.270−55.930 10.930 −17.430 −800 −17.560 21 4.858 13.152 −8.241 −32.62534.583 2.462 −2.100 22 4.030 −10.672 72.926 83.723 4.620 19.296 −2.68623 20.370 4.011 −7.669 107.453 −23.005 189.703 54.850 24 3.808 −9.408−530.750 22.837 −27.105 −22.324 66.015 25 3.620 −10.428 39.821 −38.7624.342 10.303 −2.323 26 3.802 −8.955 64.595 12384.769 −17.503 299.09357.797 27 4.499 −15.674 39.058 453.779 −18.160 102.612 59.134 28 18.5375.313 −10.580 30.673 −10.636 6.334 −8.036

Table 59 below shows in mm a thickness (L1edgeT) of an edge of the firstlens, a thickness (L2edgeT) of the edge of the second lens, a thickness(L3edgeT) of the edge of the third lens, a thickness (L4edgeT) of theedge of the fourth lens, a thickness (L5edgeT) of the edge of the fifthlens, a thickness (L6edgeT) of the edge of the sixth lens, and athickness (L7edgeT) of the edge of the seventh lens for each of Examples1-28 described herein.

TABLE 59 Example L1edgeT L2edgeT L3edgeT L4edgeT L5edgeT L6edgeT L7edgeT1 0.271 0.346 0.259 0.354 0.283 0.265 0.818 2 0.271 0.342 0.266 0.3390.283 0.266 0.806 3 0.255 0.312 0.260 0.261 0.275 0.395 0.447 4 0.2260.349 0.220 0.222 0.283 0.752 0.546 5 0.282 0.313 0.416 0.237 0.3250.371 0.382 6 0.233 0.259 0.333 0.203 0.272 0.330 0.376 7 0.220 0.2700.348 0.224 0.259 0.269 0.437 8 0.194 0.250 0.328 0.211 0.239 0.2220.388 9 0.246 0.297 0.392 0.244 0.286 0.286 0.301 10 0.222 0.377 0.2350.240 0.189 0.260 0.323 11 0.172 0.340 0.207 0.355 0.401 0.262 0.680 120.163 0.350 0.257 0.281 0.193 0.260 0.446 13 0.257 0.255 0.340 0.2760.365 0.307 0.278 14 0.253 0.255 0.486 0.252 0.361 0.490 0.409 15 0.2860.336 0.498 0.261 0.427 0.497 0.489 16 0.269 0.308 0.190 0.230 0.4100.714 0.300 17 0.205 0.407 0.201 0.333 0.278 0.348 0.815 18 0.218 0.3470.211 0.259 0.277 0.251 0.950 19 0.190 0.220 0.230 0.320 0.210 0.5700.700 20 0.170 0.230 0.240 0.250 0.230 0.590 0.770 21 0.212 0.210 0.3510.213 0.236 0.357 0.445 22 0.243 0.339 0.258 0.397 0.274 0.340 0.567 230.267 0.396 0.384 0.400 0.228 0.589 0.342 24 0.231 0.289 0.255 0.2540.360 0.476 0.658 25 0.252 0.293 0.238 0.374 0.258 0.415 0.686 26 0.2930.298 0.252 0.251 0.409 0.715 0.678 27 0.246 0.280 0.254 0.273 0.3560.630 0.692 28 0.252 0.160 0.429 0.302 0.430 0.391 0.433

Table 60 below shows in mm a sag value (L5S1 sag) at an outer end of theoptical portion of the object-side surface of the fifth lens, a sagvalue (L5S2 sag) at an outer end of the optical portion of theimage-side surface of the fifth lens, a thickness (Yc71P1) of theseventh lens at a first inflection point on the object-side surface ofthe seventh lens, a thickness (Yc71P2) of the seventh lens at a secondinflection point on the object-side surface of the seventh lens, and athickness (Yc72P1) of the seventh lens at a first inflection point onthe image-side surface of the seventh lens for each of Examples 1-28described herein.

TABLE 60 Exam- L5S1 L5S2 ple sag sag Yc71P1 Yc71P2 Yc72P1  1 −0.447−0.533 1.324 — 0.931  2 −0.426 −0.531 1.329 — 0.929  3 −0.392 −0.4340.613 0.621 0.71  4 −0.404 −0.356 0.837 0.815 0.946  5   0.197   0.1990.678 0.803 0.795  6   0.200   0.202 0.568 0.67 0.667  7   0.115   0.1390.93 — 0.811  8   0.123   0.129 0.859 — 0.769  9   0.162   0.188 0.969 —0.881 10 −0.466 −0.526 2.933 — 4.142 11 −0.479 −0.556 3.24 — 4.484 12−0.453 −0.501 2.843 — 4.129 13   0.210   0.245 0.569 0.641 0.67 14  0.102   0.142 0.562 — 0.686 15   0.054   0.053 0.607 — 0.717 16 −0.261−0.263 0.473 — 0.631 17 −0.485 −0.407 0.89 — 0.92 18 −0.479 −0.422 — —0.781 19 −0.410 −0.430 0.8 — 1.28 20 −0.420 −0.430 0.81 — 1.27 21 −0.301−0.528 0.849329 — 0.717966 22 0.508   0.780 — — 0.888 23   0.176   0.3020.595 — 0.672 24   0.280   0.281 0.883 0.915 0.988 25   0.276   0.509 —— 0.968 26   0.092   0.103 0.955 1.103 1.128 27   0.179   0.173 0.9641.114 1.13 28   0.261   0.256 0.587 — 0.763

Table 61 below shows in mm an inner diameter of each of the first toseventh spacers for each of Examples 1-28 described herein. S1d is aninner diameter of the first spacer SP1, S2d is an inner diameter of thesecond spacer SP2, S3d is an inner diameter of the third spacer SP3, S4dis an inner diameter of the fourth spacer SP4, S5d is an inner diameterof the fifth spacer SP5, S6d is an inner diameter of the sixth spacerSP6, and S7d is an inner diameter of the seventh spacer SP7.

TABLE 61 Example S1d S2d S3d S4d S5d S6d S7d 1 2.84 2.53 2.87 3.35 4.186.11 — 2 2.44 2.16 2.25 2.93 4.08 5.53 — 3 2.44 2.16 2.25 2.93 4.08 5.53— 4 2.86 2.52 2.42 2.72 3.38 5.82 — 5 1.5 1.34 1.32 1.72 2.31 3.03 — 61.24 1.15 1.03 1.48 1.9 2.46 — 7 1.34 1.23 1.03 1.5 1.98 2.66 — 8 1.251.14 0.94 1.5 1.86 2.44 — 9 1.49 1.39 1.16 1.7 2.21 2.95 — 10 2.31 2.162.54 2.94 4.06 4.84 5.12 11 2.46 2.26 2.53 2.86 3.63 4.47 4.79 12 2.472.21 2.53 2.79 3.78 4.51 — 13 2.58 2.4 2.49 2.97 4.16 4.89 5.51 14 2.592.5 2.53 2.9 3.8 4.9 — 15 2.77 2.61 2.79 3.12 4.03 4.89 — 16 2.12 2.12.04 2.12 2.81 4.64 — 17 2.32 2.36 2.56 2.93 3.7 4.35 — 18 2.41 2.3 2.663.03 3.76 — — 19 2.314 1.98 2.298 2.776 3.232 4.828 — 20 2.49 2.02 2.272.48 2.03 4.71 — 21 2.42 2.23 2.07 2.41 3.08 4.23 — 22 2.52 2.31 2.563.45 4.66 5.67 — 23 2.71 2.53 2.52 3.03 3.78 4.83 — 24 2.36 2.03 2.252.65 3.64 5.14 5.3  25 2.06 1.89 2.15 2.7 3.61 4.56 4.84 26 1.89 1.842.33 2.73 3.73 5.43 6.03 27 2.39 2.15 2.4 2.82 3.94 5.68 6.02 28 3.223.11 2.92 3.25 4.6 5.6 6.15

Table 62 below shows in mm³ a volume of each of the first to seventhlenses for each of Examples 1-28 described herein. L1v is a volume ofthe first lens, L2v is a volume of the second lens, L3v is a volume ofthe third lens, L4v is a volume of the fourth lens, L5v is a volume ofthe fifth lens, L6v is a volume of the sixth lens, and L7v is a volumeof the seventh lens.

TABLE 62 Example L1v L2v L3v L4v L5v L6v L7v 1 9.275 5.4262 7.66829.6317 13.3855 16.9502 47.3187 2 10.25668 6.2334 7.9096 10.6038 13.147215.6863 47.1347 3 5.1971 5.216 5.7114 7.6743 11.4157 17.3987 26.6851 47.0224 7.0394 5.8013 7.8824 11.1935 36.4427 34.1183 5 8.0184 9.56289.6052 8.4128 12.0326 16.7196 28.0267 6 6.3442 6.9494 7.7597 6.20766.8959 10.3364 16.5597 7 5.7249 8.0179 8.3774 7.9589 10.3434 11.103127.1511 8 5.0799 5.7347 5.8704 6.465 6.7471 7.523 21.0455 9 6.87349.0897 9.3053 8.2626 10.8967 13.6572 31.8443 10 5.2342 5.0595 5.14554.1402 5.9856 8.1378 19.6812 11 4.9213 4.3965 4.4008 5.9124 9.51277.6205 23.7487 12 5.2239 4.9915 5.6183 5.5026 5.5766 7.2491 20.0822 135.639 4.858 6.6748 7.1627 11.0369 11.9357 27.1217 14 5.1778 5.14278.2986 6.3777 12.6369 14.9811 20.731 15 5.9227 6.9971 9.1275 7.02512.2307 15.4792 23.2093 16 3.8115 4.6714 4.0552 5.0631 11.2844 25.761816.5646 17 4.2347 5.5368 5.5931 7.5471 9.4202 8.9992 27.3258 18 4.65294.6572 6.2312 6.7131 10.2673 11.7401 33.5372 19 5.7312 3.6543 4.19579.084 7.949 27.8626 30.6587 20 5.4092 4.6711 5.1562 7.663 8.7343 28.007534.4019 21 3.7681 3.4595 4.0278 5.0067 6.9793 11.3507 18.8879 22 6.17395.7042 6.968 11.8343 12.9092 21.1543 39.7461 23 4.9598 8.122 7.22228.2929 8.6024 18.837 19.7464 24 5.4854 3.9796 4.1274 4.6927 9.884820.3357 35.3318 25 3.81 3.9751 3.9272 6.1885 7.516 13.0347 31.8586 264.7517 4.3655 6.4562 5.0723 9.8674 36.8705 47.4701 27 5.6273 4.9495.1423 5.0791 9.3624 31.5832 47.9081 28 7.5192 7.1322 12.3605 9.038517.2925 20.5539 33.5701

Table 63 below shows in mg a weight of each of the first to seventhlenses for each of Examples 1-28 described herein. L1w is a weight ofthe first lens, L2w is a weight of the second lens, L3w is a weight ofthe third lens, L4w is a weight of the fourth lens, L5w is a weight ofthe fifth lens, L6w is a weight of the sixth lens, and L7w is a weightof the seventh lens.

TABLE 63 Example L1w L2w L3w L4w L5w L6w L7w 1 9.646 6.674 7.975 11.84716.732 17.628 49.211 2 10.667 7.667 8.226 13.043 16.434 16.314 49.020 35.405 6.416 5.940 7.981 14.270 21.748 26.952 4 7.303 8.658 6.033 8.19813.992 45.553 34.459 5 8.339 9.945 12.007 10.516 12.514 20.900 28.307 66.598 7.227 9.700 7.760 7.172 12.921 16.725 7 5.954 8.339 10.472 9.71012.619 11.547 28.237 8 5.283 5.964 7.338 7.887 8.231 7.824 21.887 97.148 9.453 11.632 10.080 13.294 14.203 33.118 10 5.444 6.223 5.3514.306 7.362 8.463 20.468 11 5.118 5.408 4.577 6.149 11.701 7.925 24.69912 5.433 6.140 5.843 5.723 6.859 7.539 20.885 13 5.865 5.052 8.344 8.95311.478 14.920 27.393 14 5.385 5.348 10.373 6.633 13.142 15.580 21.560 156.160 7.277 11.409 7.306 12.720 19.349 24.138 16 3.964 5.746 4.217 5.26614.106 26.792 17.227 17 4.404 6.810 5.817 7.849 11.587 9.359 28.419 184.839 5.728 6.480 6.982 12.629 12.210 34.879 19 5.960 4.495 5.161 9.4479.936 34.828 30.965 20 5.626 5.745 6.342 7.970 10.918 35.009 34.746 213.919 3.598 4.954 5.207 8.724 11.805 19.643 22 6.421 7.016 7.247 14.55613.426 22.000 41.336 23 5.158 8.447 9.028 10.366 8.946 19.590 20.536 245.705 4.895 5.077 4.880 12.356 25.420 35.685 25 3.962 4.889 4.084 7.6127.817 13.556 33.133 26 4.942 5.370 6.714 5.275 12.334 38.345 47.945 275.852 6.087 5.348 5.282 11.516 32.847 48.387 28 7.819968 7.41748815.45063 11.29813 21.61563 21.37606 34.9129

Table 64 below shows in mm an overall outer diameter (including a rib)of each of the first to seventh lenses for each of Examples 1-28described herein. L1TR is an overall outer diameter of the first lens,L2TR is an overall outer diameter of the second lens, L3TR is an overallouter diameter of the third lens, L4TR is an overall outer diameter ofthe fourth lens, L5TR is an overall outer diameter of the fifth lens,L6TR is an overall outer diameter of the sixth lens, and L7TR is anoverall outer diameter of the seventh lens.

TABLE 64 Example L1TR L2TR L3TR L4TR L5TR L6TR L7TR 1 4.73 4.93 5.436.03 7 7.4 7.6 2 5.02 5.22 5.52 6.32 6.94 7.34 7.54 3 4.22 4.42 4.725.52 6.44 6.84 7.04 4 4.82 5.02 5.32 6.02 6.74 7.14 7.34 5 2.44 2.542.69 2.9 3.19 3.44 3.62 6 2.29 2.4 2.54 2.63 2.78 2.91 3.04 7 2.46 2.582.69 2.8 3.17 3.31 3.47 8 2.19 2.32 2.44 2.57 2.74 3 3.11 9 2.37 2.52.65 2.75 3.04 3.44 3.54 10 4.22 4.42 4.54 4.72 5.4 5.74 6.3 11 4.084.23 4.36 4.53 5.11 5.56 6.15 12 4.33 4.53 4.66 4.92 5.09 5.72 5.97 134.21 4.3 4.44 4.84 5.47 6.12 6.9 14 4.25 4.34 4.48 4.88 5.51 6.16 6.4815 4.43 4.52 4.66 5.06 5.5 6.26 6.58 16 3.51 3.81 4.39 4.98 5.85 6.156.25 17 3.93 4.13 4.71 6.17 5.3 6.57 6.67 18 4.03 4.23 4.81 5.4 6.276.67 6.77 19 4.228 4.402 4.87 5.476 6.332 6.714 6.92 20 4.26 4.46 5.035.62 6.5 6.9 7.1 21 3.83 4.03 4.23 4.83 5.32 5.72 5.92 22 4.63 4.93 5.236.03 6.92 7.32 7.52 23 4.29 4.38 4.52 4.92 5.65 6.26 6.77 24 4.09 4.184.3 4.53 5.22 6.62 7.32 25 3.73 3.82 3.96 4.39 4.96 6 6.86 26 3.97 4.064.19 4.63 5.2 7.15 8.02 27 4.39 4.48 4.61 5.04 5.61 7.09 7.95 28 4.874.96 5.09 5.52 6.37 7.41 7.84

Table 65 below shows in mm a maximum thickness of the rib of each of thefirst to seventh lenses for each of Examples 1-28 described herein. Themaximum thickness of the rib is a thickness of a portion of the rib incontact with a spacer. L1rt is a maximum thickness of the rib of thefirst lens, L2rt is a maximum thickness of the rib of the second lens,L3rt is a maximum thickness of the rib of the third lens, L4rt is amaximum thickness of the rib of the fourth lens, L5rt is a maximumthickness of the rib of the fifth lens, L6rt is a maximum thickness ofthe rib of the sixth lens, and L7rt is a maximum thickness of the rib ofthe seventh lens.

TABLE 65 Example L1rt L2rt L3rt L4rt L5rt L6rt L7rt 1 0.61 0.37 0.330.32 0.37 0.465 0.895 2 0.585 0.395 0.34 0.41 0.305 0.343 0.91 3 0.4350.425 0.39 0.41 0.345 0.375 0.53 4 0.435 0.495 0.22 0.29 0.325 0.810.595 5 0.6 0.58 0.56 0.47 0.34 0.4 0.47 6 0.54 0.5 0.52 0.42 0.21 0.390.4 7 0.39 0.44 0.47 0.36 0.42 0.38 0.47 8 0.54 0.37 0.41 0.33 0.37 0.270.42 9 0.6 0.51 0.55 0.35 0.46 0.47 0.52 10 0.435 0.43 0.36 0.215 0.320.33 0.405 11 0.42 0.42 0.36 0.31 0.45 0.36 0.7 12 0.41 0.41 0.37 0.370.29 0.33 0.52 13 0.55 0.38 0.58 0.41 0.5 0.32 0.53 14 0.49 0.39 0.680.36 0.63 0.49 0.48 15 0.49 0.47 0.71 0.47 0.56 0.5 0.55 16 0.482 0.3950.316 0.328 0.422 0.885 0.409 17 0.431 0.556 0.361 0.429 0.38 0.38 0.66718 0.431 0.457 0.361 0.364 0.38 0.334 0.729 19 0.457 0.314 0.315 0.3450.276 0.741 0.774 20 0.431 0.408 0.319 0.369 0.252 0.674 0.798 21 0.390.33 0.3 0.26 0.425 0.55 0.534 22 0.43 0.41 0.35 0.48 0.305 0.57 0.71 230.48 0.56 0.58 0.47 0.34 0.62 0.44 24 0.51 0.25 0.32 0.32 0.51 0.53 0.7225 0.4 0.42 0.37 0.5 0.32 0.46 0.72 26 0.47 0.41 0.45 0.41 0.47 0.93 0.727 0.44 0.39 0.4 0.4 0.38 0.74 0.72 28 0.56 0.41 0.56 0.54 0.52 0.440.54

FIG. 60 is a cross-sectional view illustrating an example of a seventhlens.

FIG. 60 illustrates the overall outer diameter (L7TR) of the seventhlens, the thickness (L7rt) of the flat portion of the rib of the seventhlens, the thickness (L7edgeT) of the edge of the seventh lens, thethickness (Yc71P1) of the seventh lens at the first inflection point onthe object-side surface of the seventh lens, the thickness (Yc71P2) ofthe seventh lens at the second inflection point on the object-sidesurface of the seventh lens, and the thickness (Yc72P1) of the seventhlens at the first inflection point on the image-side surface of theseventh lens.

The examples described above enable the optical imaging system to beminiaturized and aberrations to be easily corrected to achieve highresolution.

While this disclosure includes specific examples, it will be apparentafter an understanding of the disclosure of this application thatvarious changes in form and details may be made in these exampleswithout departing from the spirit and scope of the claims and theirequivalents. The examples described herein are to be considered in adescriptive sense only, and not for purposes of limitation. Descriptionsof features or aspects in each example are to be considered as beingapplicable to similar features or aspects in other examples. Suitableresults may be achieved if the described techniques are performed in adifferent order, and/or if components in a described system,architecture, device, or circuit are combined in a different manner,and/or replaced or supplemented by other components or theirequivalents. Therefore, the scope of the disclosure is defined not bythe detailed description, but by the claims and their equivalents, andall variations within the scope of the claims and their equivalents areto be construed as being included in the disclosure.

What is claimed is:
 1. An optical imaging system comprising: a firstlens having a positive refractive power, a convex object-side surface ina paraxial region thereof, and a concave image-side surface in aparaxial region thereof; a second lens having a negative refractivepower, a convex object-side surface in a paraxial region thereof, and aconcave image-side surface in a paraxial region thereof; a third lenshaving a negative refractive power, a convex object-side surface in aparaxial region thereof, and a concave image-side surface in a paraxialregion thereof; a fourth lens having a positive refractive power; afifth lens having a negative refractive power; a sixth lens having arefractive power; and a seventh lens having a negative refractive power,wherein the first to seventh lenses are sequentially disposed inascending numerical order along an optical axis of the optical imagingsystem from an object side of the optical imaging system toward animaging plane of the optical imaging system.
 2. The optical imagingsystem of claim 1, wherein the optical imaging system satisfies0.01<R1/R4<1.3, where R1 is a radius of curvature on the optical axis ofthe object-side surface of the first lens, R4 is a radius of curvatureon the optical axis of the image-side surface of the second lens, and R1and R4 are expressed in a same unit of measurement.
 3. The opticalimaging system of claim 1, wherein the optical imaging system satisfies0.05<R1/R6<0.9, where R1 is a radius of curvature on the optical axis ofthe object-side surface of the first lens, R6 is a radius of curvatureon the optical axis of the image-side surface of the third lens, and R1and R6 are expressed in a same unit of measurement.
 4. The opticalimaging system of claim 1, wherein the sixth lens has a convexobject-side surface in a paraxial region thereof, and the opticalimaging system satisfies 0.2<R1/R11<1.2, where R1 is a radius ofcurvature on the optical axis of the object-side surface of the firstlens, R11 is a radius of curvature on the optical axis of theobject-side surface of the sixth lens, and R1 and R11 are expressed in asame unit of measurement.
 5. The optical imaging system of claim 1,wherein the sixth lens has a convex object-side surface in a paraxialregion thereof, the seventh lens has a concave image-side surface in aparaxial region thereof, and the optical imaging system satisfies0.6<(R11+R14)/(2*R1)<3.0, where R1 is a radius of curvature on theoptical axis of the object-side surface of the first lens, R11 is aradius of curvature on the optical axis of the object-side surface ofthe sixth lens, R14 is a radius of curvature on the optical axis of animage-side surface of the seventh lens, and R1, R11, and R14 areexpressed in a same unit of measurement.
 6. The optical imaging systemof claim 5, wherein the optical imaging system satisfies0.1<(R11+R14)/(R5+R6)<1.0, where R5 is a radius of curvature on theoptical axis of the object-side surface of the third lens, R6 is aradius of curvature on the optical axis of the image-side surface of thethird lens, and R5, R6, R11, and R14 are expressed in a same unit ofmeasurement.
 7. The optical imaging system of claim 1, wherein theoptical imaging system satisfies0.1<(1/f1+1/f2+1/f3+1/f4+1/f5+1/f6+1/f7)*f<0.8, where f1 is a focallength of the first lens, f2 is a focal length of the second lens, f3 isa focal length of the third lens, f4 is a focal length of the fourthlens, f5 is a focal length of the fifth lens, f6 is a focal length ofthe sixth lens, f7 is a focal length of the seventh lens, f is anoverall focal length of the optical imaging system, and f1, f2, f3, f4,f5, f6, f7, and f are expressed in a same unit of measurement.
 8. Theoptical imaging system of claim 1, wherein the optical imaging systemsatisfies 0.1<(1/f1+1/f2+1/f3+1/f4+1/f5+1/f6+1/f7)*TTL<1.0, where f1 isa focal length of the first lens, f2 is a focal length of the secondlens, f3 is a focal length of the third lens, f4 is a focal length ofthe fourth lens, f5 is a focal length of the fifth lens, f6 is a focallength of the sixth lens, f7 is a focal length of the seventh lens, TTLis a distance along the optical axis from the object-side surface of thefirst lens to the imaging plane, and f1, f2, f3, f4, f5, f6, f7, and TTLare expressed in a same unit of measurement.
 9. The optical imagingsystem of claim 1, wherein the sixth lens has a convex object-sidesurface in a paraxial region thereof, the seventh lens has a concaveimage-side surface in a paraxial region thereof, and the optical imagingsystem satisfies 0.2<TD1/D67<0.8, where TD1 is a thickness along theoptical axis of the first lens, D67 is a distance along the optical axisfrom an object-side surface of the sixth lens to an image-side surfaceof the seventh lens, and TD1 and D67 are expressed in a same unit ofmeasurement.
 10. The optical imaging system of claim 1, wherein theoptical imaging system satisfies SD56<SD67, where SD56 is a distancealong the optical axis from an image-side surface of the fifth lens toan object-side surface of the sixth lens, SD67 is a distance along theoptical axis from an image-side surface of the sixth lens to anobject-side surface of the seventh lens, and SD56 and SD67 are expressedin a same unit of measurement.
 11. The optical imaging system of claim1, wherein the optical imaging system satisfies 0.4<ΣTD/TTL<0.7, whereΣTD is a sum of thicknesses along the optical axis of the first toseventh lenses, TTL is a distance along the optical axis from theobject-side surface of the first lens to the imaging plane, and ΣTD andTTL are expressed in a same unit of measurement.
 12. The optical imagingsystem of claim 1, wherein the optical imaging system satisfies0.6<TTL/(2*IMG HT)<0.9, where TTL is a distance along the optical axisfrom the object-side surface of the first lens to the imaging plane, IMGHT is an image height on the imaging plane and is equal to one half of adiagonal length of the imaging plane, and TTL and IMG HT are expressedin a same unit of measurement.
 13. The optical imaging system of claim1, wherein the fourth lens has a convex object-side surface in aparaxial region thereof, the sixth lens has a convex object-side surfacein a paraxial region thereof, and the seventh lens has a concaveimage-side surface in a paraxial region thereof.
 14. The optical imagingsystem of claim 13, wherein the fourth lens has a convex image-sidesurface in a paraxial region thereof, and the sixth lens has a concaveimage-side surface in a paraxial region thereof.
 15. The optical imagingsystem of claim 13, wherein the sixth lens has a positive refractivepower.